Question

Simplify the expression. State any restrictions on the variable. 1-x/x^2+5x-6

Answer 1

\[1-x \over x^2+5x-6\]

Answer 2

x^2 + 5x -6 =(x+6)(x-1)

(1-x)/((x^2+5x-6)) = -(x-1)/((x+6)(x-1)) = -1/(x+6)
(x+6)=0
x=-6
denominator cannot be zero otherwise, the fraction is undefined.
so x cannot be -6