w(2w-1)=21

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w(2w-1)=21

Guest Apr 22, 2015

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Best Answer

$\\w(2w-1)=21\\ 2w^2-w-21=0\\ 2w^2+6w-7w-21=0\\ 2w(w+3)-7(w+3)=0\\ (2w-7)(w+3)=0\\ w=7/2 \;\;or\;\;w=-3$

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Melody Apr 22, 2015

Melody · Answer 1 · 2015-04-22T10:30:55

$\\w(2w-1)=21\\ 2w^2-w-21=0\\ 2w^2+6w-7w-21=0\\ 2w(w+3)-7(w+3)=0\\ (2w-7)(w+3)=0\\ w=7/2 \;\;or\;\;w=-3$

If you do not understand then ask questions about my answer :)

Guest · Answer 2 · 2015-04-22T06:37:47

w=21

or 2w-1=21 2w=22 w=11