Question

If x+y=4 and x square+y square=7 , than what is xy

Answer 1

Answer:

[tex] xy=4.5[\tex]

Step-by-step explanation:

[tex] x+y=4 \\ x^2 +y^2=7\\

xy=\frac{(x+y)^2-(x^2+y^2)}{2}

xy=4.5[\tex]

Hope it helps.