How do you evaluate \frac { 4\cdot ( x - 1) } { ( 1- x ) \cdot 2}?

1 Answer
Sep 6, 2017

-2

Explanation:

(4 * (x - 1))/((1 - x) *2)

change a sign for (x - 1) to - (-x + 1) = - (1 - x)

(4 * - (1 - x))/((1 - x) * 2) = (-4 *cancel((1 - x)))/(cancel((1 - x)) *2)

= -4 /2 = -2