Question

resolva cubo da soma de potência:(x+5).(x+5).(x+5)​

Answer 1

$= \binom{3}{0} {x}^{3} {5}^{0} + \binom{3}{1} {x}^{2} {5}^{1} + \binom{3}{2} {x}^{1} {5}^{2} + \binom{3}{3} {x}^{0} {5}^{3} \\ \\ = (1) {x}^{3} + (3)5 {x}^{2} + (3)25x + (1)125 \\ \\ = {x}^{3} + 5 {x}^{2} + 25x + 125$