Solve the given nonlinear system by the addition method.
4x^2-2y^2=-2
x^2+4y^2=40
I'd do them as simultaneous equations solving by elimination method
multiply the 1st one by 2
add it to your second equation
You get
9x^2 = 36
solve
x=+-2
put each of these back into an original equation to get hte possible y values.
+6 
+6 
+118654 
