Question

R^2 + 4r = 0 please show work

Answer 1

`r^2 + 4r = 0\\ r(r+4)=0\\ r=0 \vee r=-4`

Answer 2

`{ r }^( 2 )+4r=0\\ \\ r\left( r+4 \right) =0\\ \\ \therefore \quad r=0\quad \wedge \quad r=-4`