Question

Sendo a³ + b² = 126, a²b = 5 e ab² = 25, calcule (a + b)³

Answer 1

(a+b) ³

a³+3a²b+ 3ab²+ b³
126+3.5+ 3.25
126+15+75
216

Answer 2

Bom dia Liliac

correção:  a³ + b³ = 126 

a²b = 5
ab² = 25

(a + b)³ = a³ + b³ + 3a²b + 3ab² 
(a + b)³ = 126 + 15 + 75 = 216