What is the monotone f(x)=-14x^2-16x-128 ?

The monotone f(x)=-14x^2-16x-128 is Increasing:-infinity <x<-4/7 ,Decreasing:-4/7 <x<infinity

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monotone f(x)=-14x^2-16x-128

monotone intervals

f (x) = - 14 x^{2} - 16 x - 128

Increasing : - \infty < x < - \frac{4}{7}, Decreasing : - \frac{4}{7} < x < \infty

Solution steps

f^{'} (x) = - 28 x - 16

Find intervals:

Increasing

: - \infty < x < - \frac{4}{7},

Decreasing

: - \frac{4}{7} < x < \infty

Increasing : - \infty < x < - \frac{4}{7}, Decreasing : - \frac{4}{7} < x < \infty

What is the monotone f(x)=-14x^2-16x-128 ?
The monotone f(x)=-14x^2-16x-128 is Increasing:-infinity <x<-4/7 ,Decreasing:-4/7 <x<infinity