SOLUTION: What is the answer to this quadratic inequality. X^2-144<0

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Question 1200710: What is the answer to this quadratic inequality. X^2-144<0
Found 2 solutions by ikleyn, greenestamps:
Answer by ikleyn(52777) About Me  (Show Source):
You can put this solution on YOUR website!
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The answer is  -12 < X < 12,  or in the interval form,  (-12,12).


What does it mean  " what is the answer "  in your post ?


Should I understand it in a way,  that you don't want explanations,  at all ?


Is my understanding correct that your work is checking answers in somebody's textbook ?

Or filling some answers boxes in somebodies' web-site without understanding ?


I am asking to better understand your needs . . .



Answer by greenestamps(13198) About Me  (Show Source):
You can put this solution on YOUR website!


Factor the given quadratic expression:

x%5E2-144%3C0 --> %28x-12%29%28x%2B12%29%3C0

The expression is EQUAL to 0 only at x=12 and x=-12. Since the graph of the quadratic expression is an upward-opening parabola, the interval on which the expression is less than 0 is between x=-12 and x=12.

ANSWER: (-12,12)