Question

The length of a rectangle is 3 cm more than its width. The area is 40 cm². Find the dimensions of the rectangle.

Answer 1

Let the width of the rectangle be x cm.

Then the length is x + 3 cm.

x(x + 3) = 40

x² + 3x = 40

x² + 3x − 40 = 0

(x + 8) (x − 5) = 0

x = 5 or x = −8