text: You are Here: Home >< Maths
  
  # Algebra - Are my answers correct? Part 2 watch
  
  1. ( 5x +2 ) 2
  
  = ( 5x + 2 ) (5x +2 )
  
  = (5x * 5x) + (5x * 2) + (2 * 5x) + (2 * 2)
  
  = (25x2) + (10x) + (10x) + (4)
  
  = 25x2 + 20x + 4
  2. (Original post by the bear)
  for a rectangle you multiply the long side by the short side.
  
  for a square the long side and the short side are the same length.
  (Original post by RDKGames)
  That is not how area is calculated. Area has units like which means that you multiply a length by some other length (hence length squared like cm squared). If you were to multiply length by itself 4 times, like , then you would end up with something different that is .
  
  Anyway, the area of a square (or just any rectangle in general) is calculated by multiplying the length of the shape by its width.
  Ok I think I got it.
  
  The only thing is about this bit "Find an expression for the area" what does find an expression mean?
  3. (Original post by Maths_English)
  Ok I think I got it.
  
  The only thing is about this bit "Find an expression for the area" what does find an expression mean?
  Expression is something like or , so something that is not completely determined like saying the area is 1 or 10.
  Meaning that you want to give the area in terms of here.
  4. (Original post by RDKGames)
  Expression is something like or , so something that is not completely determined like saying the area is 1 or 10.
  Meaning that you want to give the area in terms of here.
  Ok so the answer should be 25x^2 + 20x + 4 correct?
  5. (Original post by Maths_English)
  Ok so the answer should be 25x^2 + 20x + 4 correct?
  Yep.
  
  ### Related university courses
  
  TSR Support Team
  
  We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.
  
  This forum is supported by:
  Updated: March 9, 2018
  Today on TSR
  
  ### Edexcel C4 Maths Unofficial Markscheme
  
  Find out how you've done here
  
  ### 2,788
  
  students online now
  
  Exam discussions
  
  Poll
  Useful resources
  
  ### Maths Forum posting guidelines
  
  Not sure where to post? Read the updated guidelines here
  
  ### How to use LaTex
  
  Writing equations the easy way
  
  ### Study habits of A* students
  
  Top tips from students who have already aced their exams
  
  ## Groups associated with this forum:
  
  View associated groups
  
  The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.
  
  Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE
explanation: The document is a discussion thread from a forum, specifically about algebra and the expansion of a binomial expression. It contains a math question and the corresponding answer. The user asks for verification of their expansion of \((5x + 2)^2\) and receives confirmation that their answer \(25x^2 + 20x + 4\) is correct.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: You are Here: Home >< Maths
  
  # Algebra - Are my answers correct? Part 2 watch
  
  1. ( 5x +2 ) 2
  
  = ( 5x + 2 ) (5x +2 )
  
  = (5x * 5x) + (5x * 2) + (2 * 5x) + (2 * 2)
  
  = (25x2) + (10x) + (10x) + (4)
  
  = 25x2 + 20x + 4
  2. (Original post by the bear)
  for a rectangle you multiply the long side by the short side.
  
  for a square the long side and the short side are the same length.
  (Original post by RDKGames)
  That is not how area is calculated. Area has units like which means that you multiply a length by some other length (hence length squared like cm squared). If you were to multiply length by itself 4 times, like , then you would end up with something different that is .
  
  Anyway, the area of a square (or just any rectangle in general) is calculated by multiplying the length of the shape by its width.
  Ok I think I got it.
  
  The only thing is about this bit "Find an expression for the area" what does find an expression mean?
  3. (Original post by Maths_English)
  Ok I think I got it.
  
  The only thing is about this bit "Find an expression for the area" what does find an expression mean?
  Expression is something like or , so something that is not completely determined like saying the area is 1 or 10.
  Meaning that you want to give the area in terms of here.
  4. (Original post by RDKGames)
  Expression is something like or , so something that is not completely determined like saying the area is 1 or 10.
  Meaning that you want to give the area in terms of here.
  Ok so the answer should be 25x^2 + 20x + 4 correct?
  5. (Original post by Maths_English)
  Ok so the answer should be 25x^2 + 20x + 4 correct?
  Yep.
  
  ### Related university courses
  
  TSR Support Team
  
  We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.
  
  This forum is supported by:
  Updated: March 9, 2018
  Today on TSR
  
  ### Edexcel C4 Maths Unofficial Markscheme
  
  Find out how you've done here
  
  ### 2,788
  
  students online now
  
  Exam discussions
  
  Poll
  Useful resources
  
  ### Maths Forum posting guidelines
  
  Not sure where to post? Read the updated guidelines here
  
  ### How to use LaTex
  
  Writing equations the easy way
  
  ### Study habits of A* students
  
  Top tips from students who have already aced their exams
  
  ## Groups associated with this forum:
  
  View associated groups
  
  The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.
  
  Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document is a discussion thread from a forum, specifically about algebra and the expansion of a binomial expression. It contains a math question and the corresponding answer. The user asks for verification of their expansion of \((5x + 2)^2\) and receives confirmation that their answer \(25x^2 + 20x + 4\) is correct.
  
  Label: question-and-answer