Question

Y sunbtracted from X equals to 7
X.Y equals to 9 then,
X square plus Y square =?

Answer 1

given
y-x = 7
x.y= 9
${ \times }^{2} + {y}^{2}$
=
${(y - x)}^{2} + 2xy$
$= {7}^{2} + 2.9$
=49+18
=67