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Popular Functions >

extreme f(x)=5-7x-4x^2

Solution

extreme points

f (x) = 5 - 7 x - 4 x^{2}

Solution

Maximum (- \frac{7}{8}, \frac{129}{16})

Solution steps

f^{'} (x) = - 8 x - 7

Find intervals:

Increasing

: - \infty < x < - \frac{7}{8},

Decreasing

: - \frac{7}{8} < x < \infty

Plug

x = - \frac{7}{8}

into

5 - 7 x - 4 x^{2} : \frac{129}{16}

Maximum (- \frac{7}{8}, \frac{129}{16})

Graph

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Frequently Asked Questions (FAQ)

What is the extreme f(x)=5-7x-4x^2 ?
The extreme f(x)=5-7x-4x^2 is Maximum(-7/8 , 129/16)