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Popular >

3x^2+9x<0

Solution

3 x^{2} + 9 x < 0

Solution

- 3 < x < 0

+1

Interval Notation

(- 3, 0)

Solution steps

3 x^{2} + 9 x < 0

Rewrite in standard form

x^{2} + 3 x < 0

Factor

x^{2} + 3 x : x (x + 3)

x (x + 3) < 0

Identify the intervals

- 3 < x < 0

Popular Examples

- x^{2} - 6 x + 6 = 0

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x^{4} + 7 x^{2} - 144

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\frac{( 4 - i )}{( 3 + 4 i )}

3 (x + 1) 2 = 108

simplify 3/(2sqrt(2))+(5sqrt(2))/4 simplify

\frac{3}{2 2} + \frac{5 2}{4}

Frequently Asked Questions (FAQ)

What is 3x^2+9x<0 ?
The solution to 3x^2+9x<0 is -3<x<0