Question

(d) a3 + 7b3 +6ab(a + 2b)​

Answer 1

ACCORDING TO ME U HAVE WRITTEN THE WRONG QUESTION

THE CORRECT SHOULD BE    $a^{3}$+$8b^{3}$+6ab(a+2b)

using identity-->  $(a+b)^{3}$= $a^{3}$+$b^{3}$+3ab(a+b)

                          =>$(a+2b)^{3}$= $a^{3}$+$(2b)^{3}$+3*a*2b(a+2b)

                          =>___,,___= $a^{3}$+$8b^{3}$+6ab(a+2b)

HENCE PROVED THAT THE ANSWER IS $(a+2b)^{3}$

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