Solve y′=4xy' = 4xy′=4x with y(0)=0y(0) = 0y(0)=0.
y=4x2y = 4x^2y=4x2
y=2x2y = 2x^2y=2x2
y=4x2+1y = 4x^2 + 1y=4x2+1
y=x2y = x^2y=x2