1/ x^2-10x - 8
I know I have to solve for zero and factor it but when I do it just comes out 1, -5 but the awnser is -1 ,5 ... I just dont understand why ? Sorry math is the subject I struggle with most .Thank you
It math course they teach you whenever they write a function they always assume all possible values that 'x' can take since you have a fraction,Originally Posted by starbrite
It can be any value EXCEPT when the denominator is zero.
Thus,
Since this is not factorable use quadradic formula,
Simplfy,
Thus,
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To make things clearly, let me explain,
And, in the final step since the numbers shared a common factor namely 2 I divided it out. Important "you cannot cancel out of a sum" meaning you cannot cancel a 2 with the 10 and leave the other 2. You must to cancel both of them whenever you deal with add/subt.