Derivative problem

[dire sierra]

I am wondering why when we derive it we come up with 28x + 14x^2..... shouldn't it be - 14x^2? am i misunderstanding when to use - and +?

[woeful thorn]

ok... the derivative here is $h'(x) = (-7x^2 + 4)(-x) + (2-x)(-14x)$ Simplify this and you got $-32x +14x^2 + ...$

[empty glacier]

print("NAME")

[woeful thorn]

you can use the product rule, $\dfrac{d}{dx}f(x)g(x) = f(x)g'(x) + g(x)f'(x)$

[empty glacier]

print("NAME")

[woeful thorn]

and try to simplify it yourself.

[dire sierra]

okay i figured it out, i forgot that its -14 and therefore -14x-1 would be +14, i didnt notice the - symbol

thank you

[devout oracle]

.solved