Question

Question 4 of 40

Which of these is a correct expansion of (3x-2)(2x2+5)?
OA. 3x 2x2 + 3x 5+2 2x² +2.5
B. 3x 2x2 + 3x.5+ (-2) 2x2 + (-2).5
O C. 3x 2x²+(-2) 2x² + 2x².5+ (-2).5
SUBMIT

Answer 1

3x • 2x^2 + 3x • 5 + (–2) • 2x^2 + (–2) • 5

Explanation:

other answer was right

Answer 2

3x* 2x^2 +3x*5 -2 * 2x^2 -2 *5

Explanation:

(3x-2)(2x^2+5)

We can FOIL to find the expansion

First 3x* 2x^2 = 6x^3

Outer 3x*5 = 15x

Inner -2 * 2x^2 = -4x^2

Last -2 *5 = -10

Add all the terms together

3x* 2x^2 +3x*5 -2 * 2x^2 -2 *5