Square both sides:
You now need to solve this. If you can picture the graphs, you'll know that there is one solution (the most positive) when equating
So, (x-5) and (x+3) are possible roots of the polynomial above. Factoring confirms this.
You have a quadratic and two solutions. You can finish this off using the quadratic formula to get the other two remaining roots (Happy)
Square both sides: .
We squared the equation.
. . So we must check for extraneous roots.
But this time, all three roots are acceptable!