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bredanativi bredanativi
  • 09-05-2014
  • Mathematics
Answered

solve for x: 2x^2-2x-24=0

Verified Answer :

Lilith
Lilith Lilith
  • 09-05-2014

\(2x^2-2x-24=0 \ \ :2\\ \\x^2- x-12=0 \\ \\x^2- x-3x+3x -12=0\\ \\x^2-4x+3x -12=0 \\ \\x(x-4)+3(x-4)=0\)

\((x-4)(x+3) =0\\ \\x-4 =0 \ \ or \ \ x+3 =0 \\ \\x=4 \ \ or \ \ x=-3\)


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