How do you simplify #(u^2+7u-18)/(u-2)# and what are the excluded values for the variables?
Although you have a numerator and denominator you are not allowed to simplify yet by cancelling, because there are terms (separated by + and * signs) rather than factors (which are multiplied)
Find the factors first.
For excluded values, remember that the denominator may not be equal to
So, ask yourself what value of