Question
The width of a rectangle is 12 less than twice the length, and the area of the rectangle is 270 m2.
What is the length of the rectangle?
What is the length of the rectangle?
Answers
oobleck
area is length * width, so if the length is x,
(2x-12)*x = 270
2x^2 - 12x - 270 = 0
x^2 - 6x - 135 = 0
so, which 2 factors of 135 differ by 6?
(2x-12)*x = 270
2x^2 - 12x - 270 = 0
x^2 - 6x - 135 = 0
so, which 2 factors of 135 differ by 6?