posted by Laura on .
Find the value of x for the area of the triangle that is 12cm sq. The base is 2x+2 and the height is x.
Solve this equation:
(1/2)(base)(height) = (x+1)x = 12
x^2 + x -12 = 0
That equation is factorable. Take the positive root. (One of them will be negative0