Question

se a2 +b2=36 (a+b)2 =64 calcule o valor de 6ab

Answer 1

(a + b)² = 64
a² + 2ab + b² = 64
a² + b² + 2ab = 64
36 + 2ab = 64
2ab = 64 - 36
2ab = 28
ab = 28:2
ab= 14

logo 6ab = 6 . 14 = 84