Question

How do you factor `u(v-1)-2(v-1)`?

Answer 1

In general
`color(white)("XXXXX")` `color(red)(a)color(green)((k)) - color(blue)(b)color(green)((k)) = (color(red)a-color(blue)b)color(green)((k))`
So
`color(red)ucolor(green)((v-1)) - color(blue)2color(green)((v-1)) = (color(red)u-color(blue)2)color(green)((v-1))`