Question

If x2 + y2 - xy = 3 and y - x = 1, then 2 + y2​

Answer 1

Step-by-step explanation:

(y-x) 2=1^2

x2+y2-2xy= 1

x2+y2=1+2xy

also,

x2+y2-xy=3

so,

x2+y2=3+xy

finally,

1+2xy=3+xy

2xy-xy=3-1

xy=2

so, x2+y2=3+xy

=3+2

=5

PLEASE