Solve Algebraically - These Simultaneous equations.Quote:

y=3x-2

Here is what I've done so far, please correct me if i'm wrong as always.Quote:

x^2+y^2=20

Can anyone solve this without using the quadratic equation? Many Thanks!Quote:

x^2+(3x-2)(3x-2)=20 x^2+9x^2-6x-6x-16=0 10x^2-12x-16=0