SOLUTION: solve ^3√5x+4+9=4 I just do not understand how to do these kinds of problems. The 3 is a small square root on the outside

Algebra ->  Radicals -> SOLUTION: solve ^3√5x+4+9=4 I just do not understand how to do these kinds of problems. The 3 is a small square root on the outside      Log On


   

Question 507276: solve
^3√5x+4+9=4
I just do not understand how to do these kinds of problems.
The 3 is a small square root on the outside
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
solve
^3√5x+4+9=4
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That is not a "small square root"; it is a cube root.
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Equation:
cbrt(5x+4) + 9 = 4
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cbrt(5x+4) = -5
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Raise both sides to the 3rd power to get:
5x+4 = -125
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5x = -129
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x = -129/5 = -25 4/5
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Cheers,
Stan H.