Question

Find the area of a rectangle with length, l = 4x + 3 and width, w = 4x - 3.

Answer 1

16x² - 9

Explanation:

Area of rectangle = l × w

= (4x + 3) (4x - 3)

= (4x)² - (3)² = (16x² - 9)

Answer 2

A = (4x-3)(4x+3)

A = 16x-9