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niaziathomas niaziathomas
  • 01-09-2014
  • Mathematics
Answered

Factor the expression -10x^2-41x-21

Verified Answer :

konrad509
konrad509 konrad509
  • 01-09-2014

\(-10x^2-41x-21=\\ -10x^2-35x-6x-21=\\ -5x(2x+7)-3(2x+7)=\\ -(5x+3)(2x+7)\)

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Lilith
Lilith Lilith
  • 01-09-2014

\(-10x^2-41x-21= -(10x^2+41x+21) =-(10x^2+35x+6x+21)=\\\\=- [(10x^2+35x)+(6x+21 )]=- [5x(2x +7 )+3(2x+7 )]=-(2x+7)(5x+3)\)


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