Question

If x + y = 9/2 and xy = 7 find x - y​

Answer 1

Step-by-step explanation:

xy=7

x+y=9/2

(x+y)^2=x2+y2+2xy

(x-y)^2=(x+y)^2-4xy

=(9/2)^-4(7)

=(81/4)-28

=81-112/4

=-31/4

x-y=√-31/4