Question 150458
Don't be hatin' ;)

{{{(10x^2-30x+20)/(x^2-1)}}}

In these types of problems, always try to factor and simplify before grinding the math.


{{{(10x^2-30x+20)/(x^2-1)}}}
{{{(10(x^2-3x+2))/(x^2-1)}}}
{{{(10(x-2)(x-1))/((x-1)(x+1))}}}   This say x cannot be 1 or -1 or the denominator will be 0
{{{(10(x-2))/((x+1))}}}

Now pick some easy x values and simplify
x=2 yields 0

You can use any value other than 1 and -1  to grind out answers

gotta luv it