Question

Solve the system.

x2 + y2 = 4
y - x = 2

Answer 1

x2 + y2 = 4
y - x = 2-->y=2+x
so we can replace 2+x instead of y in the 1st eq.---->x^2+(2+x)^2=4
x^2+4+4x+x^2=4
2X^2+4x+4=4
x^2+2x+2=1
x^2+2x+1=0

Answer 2

rewrite the second one as y = x+2 and substitute into the first one to get
\[x^2+(x+2)^2=4\]

Answer 3

what angela said!

Answer 4

u may continue Satellite ....my fingers r tired :):):)

Answer 5

square the second equation on both sides
and then add bith equatios
we get x=0 and y=2