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  • 31-10-2014
  • Mathematics
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solve the equation 40a^2+4a=0

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Аноним Аноним
  • 02-11-2014
[tex]40a^2+4a=0\ \ \ \ |divide\ both\ sides\ by\ 4\\\\10a^2+a=0\\\\a(10a+1)=0\iff a=0\ or\ 10a+1=0\\\\a=0\ or\ 10a=-1\\\\\boxed{a=0\ or\ a=-0.1}[/tex]
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