Question

Find the product by using suitable identity (x+7)^3

Answer 1

Answer:

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Answer 2

We know,

$\bullet \:\: \rm {(a+b)}^{3} = {a}^3+b^3+3ab(a+b)$

Here,

        $\bf{ (x+7)^3}\\\\\bf{(x)^3+(7)^3+3(x)(7)[x+7]}\\\\\bf{ x^3+343+21x(x+7)}\\\\\boxed{\bf \red{x^3 +343+21x^2+147x}}$