Question

02 - Se X2 + y2 = 5 eX.Y= 3, então o valor de (X+Y)'é:
a) 25
b) 11
c) 8
d) 14​

Answer 1

(x + y)² =

x²+y² + 2.xy =

5 + 2.(3) =

5 + 6 =

11 ✓