Question

si xy=4 , x+y= 3
halle :
${x}^{2} + {y}^{2}$
​

Answer 1

Respuesta:

1

Explicación paso a paso:

$(x+y)^2=x^2+2xy+y^2\\\\(3)^2=x^2+y^2+2(4)\\\\9=x^2+y^2+8\\\\x^2+y^2=9-8\\\\x^2+y^2=1$