Question

factorise
(a+b)^3 - 8(a-b)^3​

Answer 1

Answer:

(a+b) ^3 +8(a-b)^3

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

=(a+b+2a-2b){(a+b)^2-2(a+b)-(a-b) +4(a-b)^2}

(a-b) (a^2+2ab+b^2-2a^2+2b^2+4a^2-8ab+4b^2)

=(a-b)(3a^2-6ab+7b^2)

Answer 2

Answer:

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