Question

expand the question of (7+m)cube

Answer 1

We Know, (a + b)³ = a³ + b³ + 3ab(a + b)



Applying formula, we get,



(7 + m)³

=> (7)³ + (m)³ + 3(7m)(7 + m)

=> 343 + m³ + 21m(7 + m)

=> 343 + m³ + 147m + 21m²

Answer 2

$(7 + m) ^{3} \\ 7 ^{3} + m ^{3} + 3(7) ^{2} (m) + 3(7)(m)^{2} \\ 343 + m ^{3} + 147m + 21m ^{2}$