College algebra question. inequalities interval

AI Thread Summary
The discussion revolves around solving an inequality and expressing the solution in interval notation. The user initially struggled with identifying the lower bound of the interval, which they believed to be a negative number. After some calculations, they concluded that the correct lower bound is -7. The final solution set is expressed as (-7, 4). The conversation highlights the challenges of finding exact values in algebraic inequalities.
camilus
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Homework Statement


Solve the following inequality and express the solution set in interval notation.

http://www.webassign.net/www24/symImages/4/6/aaf987edafbf00c172f8cfaf01966c.gif

The Attempt at a Solution



I got most of the answer right, except the lower interval.

the answer is:

( ? , 4 )

the question is find the ?

it is a negative number like -4x10^8, and I have narrowed it down to somewhere around -3.98558x10^8, but whata ****, how the hell m I supposed to get EXACT number?
 
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haha nevermind sorry guys, I got the aswer already, it was -7..
 

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