Question

помощь,тут надо найти x-? y-?​

Answer 1

{x+y=7

{2x^2-y^2=2

y=7-x

2x^2-(7-x)^2=2

2x^2-49+14x-x^2=2

x^2+14x-49=2

x^2+14x-51=0

x1=-17

x2=3

y1=24

y2=4