Question

Choose the correct product of (5x + 4)2.

25x2 + 40x + 16

25x2 − 16

25x2 + 16

25x2 − 40x + 16

Answer 1

The answer is, in fact, A. I took the test and the answer was correct.

Answer 2

25x^2 + 40x + 16

Explanation:

(5x + 4)^2

= (5x + 4)*(5x + 4)

= 25x^2 + 20x + 20x + 16

= 25x^2 + 40x + 16