Question 475565
x+y =17
x=17-y
x^2+y^2=145

(17-y)^2+y^2=145

289-34y+y^2+y^2=145
2y^2-34y+289-145=0
2y^2-34y+144=0
/2
y^2-17y+72=0
y^2-9y-8y+72=0
y(y-9)-8(y-9)=0
(y-9)(y-8)=0
y=9