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Popular >

x^2+4x-21>= 0

Solution

x^{2} + 4 x - 21 \geq 0

Solution

x \leq - 7 or x \geq 3

+1

Interval Notation

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

Solution steps

x^{2} + 4 x - 21 \geq 0

Factor

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

(x - 3) (x + 7) \geq 0

Identify the intervals

x \leq - 7 or x \geq 3

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\frac{1}{2} \cdot 72 \cdot (0.05 - 0.03)

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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