A rectangular circuit board is designed to have width w inches, perimeter p inches, and area n square inches. Which of the following equations must be true?  Choose the correct choice from the following choices:	A) w^2 + pw + n = 0	B) w^2 - pw + 2n = 0	C) 2w^2 + pw + 2n = 0	D) 2w^2 - pw - 2n = 0	E) 2w^2 - pw + 2n = 0
Notice that we can discard options A, and C right away. The sum of 3 positive values Cannot be 0.   Now, assume:   Width =w = 1 inchand length = 1 inch;   Perimeter =p = 4 inches;   Area =n = 1 square inches.   Plug the values of w, p, and n into the answer choices: only for E 2w^2 - pw  + 2= 
<gadget id="calculator"> + 2</gadget>
<output>2</output>
2 - 4 + 2= 
<gadget id="calculator">2 - 4 + 2</gadget>
<output>0</output>
0.   Answer: 2w^2 - pw + 2n= 0.
<result>E</result>
A rectangular circuit board is designed to have width w inches, perimeter p inches, and area n square inches. Which of the following equations must be true?