how do u solve this inequality? a) x^2 - x - 8 < 0 b) x ^3 + 3x^2 - 18x - 22 < and equal to 0
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Originally Posted by calchelp how do u solve this inequality? a) x^2 - x - 8 < 0 ... Hello, to a): ...................complete the square ...............calculate the square-root
im sorry could u explain what step u took...im confused how that went to the next
Originally Posted by calchelp a) x^2 - x - 8 < 0 Let's try it this way. Solve So Thus we need to solve: Now, break the real numbers into three intervals and check the inequality on these intervals: ==> (No!) ==> (Check!) ==> (No!) So the inequality is only true on as Earboth said. -Dan
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