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Popular >

x^2-81>0

Solution

x^{2} - 81 > 0

Solution

x < - 9 or x > 9

+1

Interval Notation

(- \infty, - 9) \cup (9, \infty)

Solution steps

x^{2} - 81 > 0

Move

81

to the right side

x^{2} > 81

For

u^{n} > a

, if

n

is even then

x < - 81 or x > 81

81 = 9

x < - 9 or x > 9

Popular Examples

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16 - c^{2}

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\frac{3}{7}

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(x + 2) (x - 3) (x + 8) \leq 0

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3 16 x^{4} y^{4} z

m^{2} - 4 m + 5 = 0

Frequently Asked Questions (FAQ)

What is x^2-81>0 ?
The solution to x^2-81>0 is x<-9\lor x>9