SOLUTION: A trianglehas an area of 39cm^2. The base is 7 cm shorter than the height. Find the base and height.

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Question 137144: A trianglehas an area of 39cm^2. The base is 7 cm shorter than the height. Find the base and height.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
BH/2=AREA
(H-7)H/2=39
(H^2-7H)/2=39
H^2-7H=78
H^2-7H-78=0
(H-13)(H+6)=0
H-13=0
H=13 ANSWER.
B=13-7=6 ANSWER.
PROOF:
13*6/2=38
78/2=38
38=38