MHB Solving Cubic Root Algebra: Don't Know the Steps

[STS]

I don't 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 don't know the steps that lead to that answer.
View attachment 8926

 

[topsquark]

I don't 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 don't know the steps that lead to that answer.

In order for this to be correct we would need [math]\sqrt[3]{ 0.125 - 0.5 } = 0[/math], which clearly isn't true. Is there a typo?

-Dan

 

[Olinguito]

Hi STS.

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