Question

The length of a rectangle is given by L=3y + 4x while the width is

W- 7y + 2x?. Use the box method and write and expression in
standard form that represents the area of this rectangle.

Answer 1

21y² +34 yx + 8x²

Explanation:

Area of a rectangle is given by L×W where L is length, and W is width

Given L=3y+4x

W=7y+2x

Area= (3y+4x) × (7y+2x)

3y(7y+2x) + 4x(7y+2x)

21y² + 6yx +28yx+8x²

21y² +34 yx + 8x²