Question

Multiply.

(3x + 2)(3x - 2)
A. x² + 12x- 4
B. 9x² – 12x - 4
c. 9x - 4
D. 9x² + 4

Answer 1

Answer: 9x²-4

Explanation:

To solve use the formula (known as the difference of squares) a²-b²=(a+b)(a-b) and substitute a with 3x and b with 2 and then substitute to find: (3x)²-2²= 9x²-4