posted by Ara on .
The length of a rectangle is 11 cm more than its width. The area of the rectangle is 2040 cm^2.
Find the dimensions of the rectangle.
width --- x
lengyth -- x+11
x(x+11) = 2040
x^2 + 11x - 2040 = 0
(x-4)(x+51) = 0
x = 40 or x = - 51 , negative width makes no sense,
so x = 40
the rectangle is 40 cm by 51 cm