SOLUTION: The base of a triangle is 5 cm greater than the height .the area is 18cm^2 find height and length of base?

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Question 129903: The base of a triangle is 5 cm greater than the height .the area is 18cm^2 find height and length of base?
Answer by scott8148(5891) About Me  (Show Source):
You can put this solution on YOUR website!
let x=height, so x+5=base __ area=(1/2)base*height __ 18=(1/2)(x+5)(x)

multiplying by 2 __ 36=x^2+5x

subtracting 36 __ 0=x^2+5x-36

factoring __ 0=(x+9)(x-4)