Question

Xy=18 and X square + Y square is equal to 45 find the value of x - Y

Answer 1

Answer

(x-y)=3

step by step explanation

We know that (x-y)^2= x^2+y^2-2xy

given that, x^2+y^2=45 and xy=18

putting the above values in the formula we get,

(x-y)^2= 45-2(18)

=45-36

= 9

(x-y)=✓9

(x-y)=3