Question

Factories : $4-2r-2r^2$

Answer 1

Given,

$4-2r-2r^2$

$\Rightarrow -[2r^2+2r-4]$

$\Rightarrow -2[r^2+r-2]$

$\Rightarrow -2[r^2+2r-r-2]$

$\Rightarrow -2\left[r\right(r+2)-1(r+2\left)\right]$

$\Rightarrow -2\left[\right(r+2\left)\right(r-1\left)\right]$

Hence, this is the answer.