If xy+z = x(y+2z), which of the following must be true?
Choose the correct choice from the following answers.
A) 1. x=0 and z=0 B) 2. x=1 and y=1 C) 3. y=1 and z=0 D) 4. x=1 or y=0 E) 5. x=1/2 or z=0
xy+z=x(y+2z)   xy+z=xy+2= 
<gadget id="calculator">+2</gadget>
<output>2</output>
2xz   it means x=1/2 or z=0   Answer 5. x=1/2 or z=0
<result>E</result>
If xy+z = x(y+2z), which of the following must be true?