icantmath21
icantmath21 icantmath21
  • 25-07-2018
  • Mathematics
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How can solve this??

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gmany
gmany gmany
  • 25-07-2018

[tex] x^2-2x-3=0\\\\a=1;\ b=-2;\ c=-3\\\\x=\dfrac{-(-2)\pm\sqrt{(-2)^2-4(1)(-3)}}{2(1)}\\\\\boxed{x=\dfrac{2\pm\sqrt{(-2)^2-4(1)(-3)}}{2(1)}}\to\text{first answer} [/tex]

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