Posted by **Laura** on Wednesday, April 25, 2007 at 11:32am.

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

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