Simplify the rational expression. x−6/x^2−7x+6
a. x/x+1
b. 1/x−1
c. x−1/x+1
d. x/x

factor out the common binomial in the expression. 12(x-5) + 7x(x-5)
a. (x-5)(12+7x)
b. (7x-5)(12+x)
c. 2(x-5)(12+x)
d. (x+5)(12-7x)