Question

The length of a rectangle is 11 centimeters less than three timesthree times its width. its area is 42 square centimeters. find the dimensions of the rectangle.

Answer 1

Let's call the length l and the width w. The text says

3w-11 = l
lw = 42

This we can solve:

w(3w-11) = 42 => 3w² - 11w - 42 = 0

using the quadratic formula, you'll find that w=6.
Then l=7