SOLUTION: solve v^2-4v-21=0

Question 421135: solve
v^2-4v-21=0
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
v^2-4v-21=0
v^2-7v+3v-21=0
v(v-7)+3(v-7)=0
(v-7)(v+3)=0
v=7 OR v=-3
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