Question

please help me in this question​

Answer 1

Answer:

d) (a+b)(a-b)

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Answer 2

let a+b = x , a-b = y

then

x^3 - y^3

(x+y)(x^2-xy+y^2)

2a[(a+b)^2 - (a+b)(a-b) + (a-b)^2]

2a[a^2+b^2+2ab - a^2+b^2 + a^2+b^2-2ab]

2a[a^2 + 3b^2]