Question

If x2 + y2 = 80 and xy = 12, find the value of (x - y).​

Answer 1

Answer:

by using formula

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

put the values

(x-y)^2=80-2×12

(x-y)^2=80-24

(x-y)^=56

x-y=√56

x-y=√2×2×7

x-y=2√7