Question

Find the area of the rectangle below. (3x + 4) feet (WIDTH)

(x + 3) feet (HEIGHT)

A.) (3x² + 10x + 12) square feet
B.) (3x² + 13x + 12) square feet
C.) (3x + 13x + 7) square feet
D.) (3x² + 15x+12) square feet

TOPIC: Multiplying Polynomials


(I know it says the answer, I'm trying to help others.)​

Answer 1

(3x + 4)(x + 3) = 3x² + 9x + 4x + 12 =

3x² + 13x + 12 square feet

The correct answer is B.