Question

The expression (x+3)(x+5) is equivalent to?

x2−2x+15



x2+2x+15



x2+8x+15



x2−8x+15

Answer 1

B. x^2 + 8x + 15

Explanation:

Use FOIL

First

Outside

Inside

Last

F: x * x = x^2

O: x * 5 = 5x

I: 3 * x = 3x

L: 3 * 5 = 15

Combine like terms

5x + 3x = 8x

x^2 + 8x +15

B. x^2 + 8x + 15