Question 327109
solve.
X^2+Y^2=16
Y^2=x+4
y^2 - x - 4 = 0
----------- subtract 2 from 1
{{{x^2 + x - 12 = 0}}}
(x+4)*(x-3) = 0
x = -4
y = 0
--> (-4,0)
--------
x = +3
y = +/- sqrt(7)
--> (3,sqrt(7)) & (3,-sqrt(7))