Question

if x + Y equal to 8 and x y equal to 9 then find out the values of the following X square + Y square​

Answer 1

Step-by-step explanation:

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

so

$x {}^{2} + y {}^{2} = 8 { }^{2} - 2(9) \\ =64 - 18 \\ = 46$

so answer is 46