Eashka
Eashka
03-12-2014
Mathematics
contestada
I have to solve for b but I can't figure it out
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cristianmiguel
cristianmiguel
03-12-2014
2b2 + 13b -7
b 7
2b -1
(b+7)(2b-1)
b=1/2 or b=-7
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Аноним
Аноним
03-12-2014
[tex]2b^2+13b-7=0\\\\2b^2+14b-b-7=0\\\\2b(b+7)-1(b+7)=0\\\\(b+7)(2b-1)=0\iff b+7=0\ or\ 2b-1=0\\\\\boxed{b=-7\ or\ b=0.5}[/tex]
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