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can u algebra pls : (2a-1)^3

 Dec 1, 2019
edited by Guest  Dec 1, 2019
 #1
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Answer:

8a^3−12a^2+6a−1

 Dec 1, 2019
 #2
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Let us start with the original equation:

 

(2a1)3

 

Splitting it up, or making it easier, we should put it into:

 

(2a1)(2a1)(2a1)

 

Multiplying the first two,:

 

(4a22a2a+1)(2a1)

 

Simplifying and Mathifying:

 

(4a24a+1)(2a1)=(8a34a28a2+4a+2a1)=(8a312a2+6a1)

 

So in the end, the answer is:

 

(8a^3-12a^2+6a-1)

 Dec 1, 2019

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