What is the derivative of 3-4x^2 ?

The derivative of 3-4x^2 is -8x

What is the first derivative of 3-4x^2 ?

The first derivative of 3-4x^2 is -8x

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\frac{d}{d x} (3 - 4 x^{2})

- 8 x

Solution steps

\frac{d}{d x} (3 - 4 x^{2})

Apply the Sum/Difference Rule:

(f \pm g)^{'} = f^{'} \pm g^{'}

= \frac{d}{d x} (3) - \frac{d}{d x} (4 x^{2})

\frac{d}{d x} (3) = 0

\frac{d}{d x} (4 x^{2}) = 8 x

= 0 - 8 x

Simplify

= - 8 x

f (x) = (x - x^{3}), at x = 1

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