a^3+ 27b^3 + 9ab(a+3b)
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Answered by
0
Answer:
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Step-by-step explanation:
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Answered by
1
Answer:
Use the (a+b)^3 formula of expansion
Step-by-step explanation:
=a^3+9a^2b+27ab^2+27b^3
In this case,the cubic root of a^3+9a^2b+27ab^2+27b^3 is a+3b
Therefore,(a+3b)^3=a^3+9a^2b+27ab^2+27b^3
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