Question

x2 + y2 = 36 ; xy = 18 ; hallar (x + y)2 / 2

Answer 1

$\frac{ (x+y)^{2} }{2} = \frac{ x^{2} +2xy+y^{2} }{2}= \frac{36 + 2*18 }{2} = \frac{36+36}{2} = \frac{72}{2} =36$$x^{2} +y^{2}=36; xy=18$

Answer 2

Respuesta:

36

Explicación paso a paso: