Question

. Factorize: (2a+1)3 + (a-1)3

Answer 1

Step-by-step explanation:

we know that ( a+b )^3 = a^3 +b^3 + 3ab( a+b )

So by using this formula expand the value of (2a+1)^3 and (a-1)^3

solution:

(2a)^3+(1)^3+3×2a×1(2a+1) + (a)^3-(1)^3-3×a×1(a-1)

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

9a^3+12a^2+6a-3a^2+3a [adding 8a and a] [cancelling 1 and -1 ]

9a^3+9a^2+3a - answer...

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