Question

(3a+4b)³ ,,Write the cube in expanded form

Answer 1

Question given -${(3a + 4b)}^{3} \\ </p><p>Using the identity:-</p><p> {(a + b)}^{3} = {a}^{3} + {b}^{3} + 3ab(a + b) \\ {(3a)}^{3} + {(4b)}^{3} + 3 \times {(3a)}^{2} \times 4b + 3 \times 3a \times {4b}^{2} \\ = {27a}^{3} + {64b}^{3} + 108 {a}^{2} b + 144a {b}^{2}$

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