How do you simplify #(x^2-8x+12)/(x^2+7x-18)# and then find the excluded values?
To simplify a fraction we think about factorizing the numerator and denominator .
Factorizing the numerator:
We think about the trial and error method that says:
If we find two real numbers
Factorizing the denominator:
From the above factorization of numerator and denominator we
recognize the common factor