f(x)=βx+2(xβ2)2β
f(x)=-x+2x2β4x+4β=x+2βx2+4xβ4β
fΒ΄(x)=(x+2)2(β2x+4)β(x+2)β(βx2+4xβ4)β1β=(x+2)2β2x2β4x+4x+8+x2β4x+4β
fΒ΄(x)=(x+2)2βx2β4x+12β
f´´(x)=(x+2)4(β2xβ4)β(x+2)2β(βx2β4x+12)β2β(x+2)β1β
f´´(x)=(x+2)3(β2xβ4)β(x+2)β(βx2β4x+12)β2β
f´´(x)=(x+2)3(β2x2β4xβ4xβ8)+2x2+8xβ24β
f´´(x)=(x+2)3β32β