Question

The real number x and y are such that

x+y=4
x^2+y^2=22
x^4=y^4-176√7

Compute x-y

Answer 1

Answer:

from eq 3

x^4 - y^4= -176√7

( x+y) ( x -y) (x^2+y^2)= -176√7

4(x - y)*22= -176√7

x - y = -2√7