SOLUTION: Find the roots of the equation 40x-80=5x^2 by Factoring..
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Question 563073: Find the roots of the equation 40x-80=5x^2 by Factoring..
Found 2 solutions by nerdybill, Maths68:
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
40x-80=5x^2
-80=5x^2-40x
0=5x^2-40x+80
divide both sides by 5:
0=x^2-8x+16
0 = (x-4)(x-4)
x = 4
Answer by Maths68(1474) (Show Source): You can put this solution on YOUR website!
Divide by 5 both sides of above equation
Check
=====
Put x=4
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