SOLUTION: 4xsquare + 11x = 20

Question 278697: 4xsquare + 11x = 20
Found 2 solutions by stanbon, unlockmath:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
4xsquare + 11x = 20
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4x^2 + 11x - 20 = 0
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4x^2 + 16x - 5x - 20 = 0
4x(x+4)-5(x+4) = 0
(x+4)(4x-5) = 0
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x = -4 or x = 5/4
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Cheers,
Stan H.
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
Let's get everything on one side of the = sign by subtracting 20.
4x^2+11x-20 = 0
Now we can factor this to get:
(4x-5)(x+4)=0
X=-4
x=5/4
There we go. check out the answers to see if it works.
Make sense?
RJ
There's a book I wrote that might help.
www.math-unlock.com
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