Question

(a+b)³=.como fasso???

Answer 1

Soma o A+B depois faz a multiplicação por 3 ex: (5+1)³ = 6x6x6 = 216! 

Answer 2

$(a+b)^3\to \\\\ (a+b)(a+b)(a+b)\to \\\\ (a^2+ab+ab+b^2)(a+b)\to \\\\(a^2+2ab+b^2)(a+b)\to \\\\ a^3+a^2b+2a^2b+2ab^2+ab^2+b^3\to \\\\ \large\boxed{a^3+b^3+3a^2b+3ab^2}$