Question

Se x²+ y²=50 e 13xy= 169 qual o valor de (x+y)²?

Answer 1

x² + y² = 50............e 13.xy = 169....=> xy = 169 : 13....=> xy = 13

(x + y)² = x² + 2.xy + y²

.................= x² + y² + 2.xy

.................= 50 + 2 . 13

.................= 50 + 26

.................= 76......(resposta)