I can't remember how to solve for x. What are some problems where I have to solve for x?
example 1: y=x^2+2x+3 when y=2 we get x^2+2x+3=2 ,so x^2+2*x+1=0. But x^2+2*x+1=(x+1)^2,so x=-1.
example 2: ...
Examples are shown of how to solve for a variable.