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Popular >

extreme f(x)=5x^2+8x-9

Solution

extreme points

f (x) = 5 x^{2} + 8 x - 9

Solution

Minimum (- \frac{4}{5}, - \frac{61}{5})

Solution steps

f^{'} (x) = 10 x + 8

Find intervals:

Decreasing

: - \infty < x < - \frac{4}{5},

Increasing

: - \frac{4}{5} < x < \infty

Plug

x = - \frac{4}{5}

into

5 x^{2} + 8 x - 9 : - \frac{61}{5}

Minimum (- \frac{4}{5}, - \frac{61}{5})

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Frequently Asked Questions (FAQ)

What is the extreme f(x)=5x^2+8x-9 ?
The extreme f(x)=5x^2+8x-9 is Minimum(-4/5 ,-61/5)