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Cubic root algebra

STS

New member
Mar 19, 2019
5
I dont understand this.
a is not suppose to be -1; this is the only rule in the equation
The answer is the second picture, I just dont know the steps that lead to that answer.



9CF9CCB6-D594-44E5-8980-651A512FD6DD.jpeg
 

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topsquark

Well-known member
MHB Math Helper
Aug 30, 2012
1,102
The Astral plane
I dont understand this.
a is not suppose to be -1; this is the only rule in the equation
The answer is the second picture, I just dont know the steps that lead to that answer.
In order for this to be correct we would need \(\displaystyle \sqrt[3]{ 0.125 - 0.5 } = 0\), which clearly isn't true. Is there a typo?

-Dan
 

Olinguito

Well-known member
Apr 22, 2018
251
Hi STS .

You probably mean the following expression:
$$\frac{4a^2-10\times\sqrt[3]{0.064}}{3a+3+{\color{red}\sqrt[3]{0.125}}-0.5}.$$