Question 432719
x^2+y^2=100
x+y=2
y=2-x
x^2+(2-x)^2=100
x^2+4-4x+x^2=100
2x^2-4x-96=0
x^2-2x-48=0
(x-8)(x+6)=0
x=8, y=-6
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Ed