Solve y′=2x+1y' = 2x + 1y′=2x+1.
y=x2+x+Cy = x^2 + x + Cy=x2+x+C
y=2x2+x+Cy = 2x^2 + x + Cy=2x2+x+C
y=2y = 2y=2
y=x2y = x^2y=x2