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Popular >

x^2+4x-21>0

Solution

x^{2} + 4 x - 21 > 0

Solution

x < - 7 or x > 3

+1

Interval Notation

(- \infty, - 7) \cup (3, \infty)

Solution steps

x^{2} + 4 x - 21 > 0

Factor

x^{2} + 4 x - 21 : (x - 3) (x + 7)

(x - 3) (x + 7) > 0

Identify the intervals

x < - 7 or x > 3

Popular Examples

longsub 1-0.94 long subtraction

1 - 0.94

x (x - 4) = 140

simplify-5/8*2/3 simplify

- \frac{5}{8} \cdot \frac{2}{3}

(3 x + 2)^{2} = 15

simplify log_{5}(-2)simplify

lo g_{5} (- 2)

Frequently Asked Questions (FAQ)

What is x^2+4x-21>0 ?
The solution to x^2+4x-21>0 is x<-7\lor x>3