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Popular >

3x^2(x^2-81)<= 0

Solution

3 x^{2} (x^{2} - 81) \leq 0

Solution

- 9 \leq x \leq 9

+1

Solution steps

3 x^{2} (x^{2} - 81) \leq 0

Rewrite in standard form

x^{4} - 81 x^{2} \leq 0

Factor

x^{4} - 81 x^{2} : x^{2} (x + 9) (x - 9)

x^{2} (x + 9) (x - 9) \leq 0

Identify the intervals

- 9 \leq x \leq 9

Popular Examples

x/4+x/(10)+x/8 =19

\frac{x}{4} + \frac{x}{10} + \frac{x}{8} = 19

simplify 17.1*27-17.1*33+17.1*16 simplify

17.1 \cdot 27 - 17.1 \cdot 33 + 17.1 \cdot 16

simplify (sqrt(15))/(sqrt(5))simplify

\frac{15}{5}

\frac{1}{3} x > 6

3 x + 2 < 5 x + 8

Frequently Asked Questions (FAQ)

What is 3x^2(x^2-81)<= 0 ?
The solution to 3x^2(x^2-81)<= 0 is -9<= x<= 9