# algebra

posted by
**Laura**
.

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