so dy/dx ax²+bx+c=2ax+b then the derivitive of that is dy/dx 2ax+b=2a
so therefor the 2nd derivitive of the p(x) is 2a 2a=4 a=2 neato go back first derivitive dy/dx ax²+bx+c=2ax+b p'(x)=2ax+b for p'(3)=10 remember that a=2 p'(3)=(2)(2)(3)+b=10 12+b=10 b=-2