Question

Which polynomial is a difference of squares?
A. x2 – 16x + 64
B. x2 + 4
C. 9x2 – x – 36
D. 25x2 – 36

Answer 1

D. is a difference of perfect squares because both terms 25x^2 and 36 is a square (5, x, and 6). Also, difference of perfect squares MUST have a minus sign.

Answer 2

D is the polynomial with a difference of squares