SOLUTION: what are the two solutions for x when you have a triangle who's base is x+20 and who's height is x and the area is 78

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Question 721509: what are the two solutions for x when you have a triangle who's base is x+20 and who's height is x and the area is 78
Answer by nshah11(47) About Me  (Show Source):
You can put this solution on YOUR website!
A = (bh)/2 = (x)(x+20)/2 = 78
x^2 + 20x - 156 = 0
x = (-20 +/- sqrt(400 - 4(-156))/2
= (-20 + 32)/2 = 6 (Only solution that makes sense since the other solution will be negative).