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.
Since this is not factorable use quadradic formula,
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.