SOLUTION: Find the solutions of the equation.
x^3-125= 0
x^3= 125 x= 5
How can I find the COMPLEX solutions? I believe you have to use the quadratic equation but I'm not really sure
Algebra.Com
Question 344305: Find the solutions of the equation.
x^3-125= 0
x^3= 125 x= 5
How can I find the COMPLEX solutions? I believe you have to use the quadratic equation but I'm not really sure how to factor x^3-125.
Thanks!
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
No, you can't use the quadratic formula on a cubic equation.
Recognize that this is the difference of two cubes.
One solution is
.
.
.
Now find the root of the quadratic equation with the quadratic formula,
where
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