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Popular >

x^2+20x-40>0

Solution

x^{2} + 20 x - 40 > 0

Solution

x < - 235 - 10 or x > 235 - 10

+2

Interval Notation

(- \infty, - 235 - 10) \cup (235 - 10, \infty)

Decimal Notation

x < - 21.83215 \dots or x > 1.83215 \dots

Solution steps

x^{2} + 20 x - 40 > 0

Complete the square

x^{2} + 20 x - 40 : (x + 10)^{2} - 140

(x + 10)^{2} - 140 > 0

Move

140

to the right side

(x + 10)^{2} > 140

For

u^{n} > a

, if

n

is even then

x + 10 < - 140 or x + 10 > 140

x + 10 < - 140 : x < - 235 - 10

x + 10 > 140 : x > 235 - 10

Combine the intervals

x < - 235 - 10 or x > 235 - 10

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9 u^{2} + 48 u + 64

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\frac{1}{- 2 i}

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∣ 25 ∣

x + \frac{3}{2} = 3 x - 1

8 y = y^{2} + 7

Frequently Asked Questions (FAQ)

What is x^2+20x-40>0 ?
The solution to x^2+20x-40>0 is x<-2sqrt(35)-10\lor x>2sqrt(35)-10