# Cubic root algebra

#### STS

##### New member
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.

#### Attachments

• 7.7 KB Views: 14

#### topsquark

##### Well-known member
MHB Math Helper
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
Hi STS .

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