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

25x2 + 40x + 16

25x2 - 16

25x2 + 16

25x2 - 40x + 16

First, Outer, Inner, Last. Your first terms that you need to multiply are 5x and 5x 5x*5x = 25x^2 Your outer terms that you need to multiply are 5x and 4. 5x*4 = 20x Your inner terms that you need to multiply are 5x and 4. 5x*4 = 20x You last terms that you need to multiply are 4 and 4. 4*4 = 16 So you have 25x^2, 20x, 20x, and 16 that you need to "combine." 25x^2 + 20x + 20x + 16 = 25x^2 + 40x + 16