No you can't. There is no unique solution for 'x' and 'y'. The equation describes a parabola,
and every point on the parabola satisfies the equation.
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(2x)ysquared
(2-r)e-rr
x2+2x-63 = 0 When factorised: (x-7)(x+9) = 0 Therefore: x = 7 or x = -9
x2 + 63
(4 ± i2) where i2 = -1