R^2 + 4r = 0 please show work

asked Dec 12, 2016 164k views

3 votes

by Avani

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5 votes

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

Kadeem answered Dec 15, 2016

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6 votes

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

Seldaek answered Dec 19, 2016

7.6k points

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