Question

formula for (a+b)whole cube and (a-b) whole cube??

Answer 1

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Answer is in the attachment.....↗↗

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Answer 2

Answer:

The formula is

$(a+b)^3=(a^3-3a^2b+3ab^2-b^3)$

$(a-b)^3=(a^3-3a^2b+3ab^2-b^3)$

Step-by-step explanation:

We have to find the formula for $(a+b)^3$ and $(a-b)^3$

$(a+b)^3=(a+b)^2(a+b)$

The formula for $(a+b)^2$ is

$(a+b)^2=a^2+b^2+2ab$

$(a+b)^3=(a+b)^2(a+b)=(a^2+b^2+2ab)(a+b)$

                                 $=(a^3-3a^2b+3ab^2-b^3)$

The formula for $(a-b)^2$ is

$(a-b)^2=a^2+b^2-2ab$

$(a-b)^3=(a-b)^2(a-b)=(a^2+b^2-2ab)(a-b)$

                                 $=(a^3-3a^2b+3ab^2-b^3)$