Posted by **lan** on Monday, November 14, 2011 at 8:02pm.

solve the inequality. Express the solution using interval notation and graph the solution set on the real number line

x-4/x^2-4 greater or equal to O

- algebra -
**Steve**, Tuesday, November 15, 2011 at 10:42am
(x-4)/(x^2-4) >= 0

Either both top and bottom are positive, or both negative

x-4 > 0 if x > 4

x^2-4 > 0 if |x| > 2

only x > 4 satisfies both requirements

x-4 < 0 if x < 4

x^2 - 4 < 0 if |x| < 2

So, -2 < x < 2

Solution set: (-2,2)U(4,oo)

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