mch17x
mch17x mch17x
  • 14-11-2014
  • Mathematics
contestada

what is the sum of zeros of the function y=6x^2-x-2 ?

Respuesta :

FirstSineOfMadness
FirstSineOfMadness FirstSineOfMadness
  • 14-11-2014
It factors out to (2x+1)(3x-2)
zeroes are -1/2 and 2/3 sum is 1/6
Final answer:
1/6
Answer Link
kate200468
kate200468 kate200468
  • 14-11-2014
[tex]y=6x^2-x-2\ \ \ \Rightarrow\ \ \ \Delta=(-1)^2-4\cdot6\cdot(-2)=1+48=49\\\\\Delta>0\ \ \ \Rightarrow\ \ \ exist\ two\ zeros\ of\ the\ function\\\\Vieta's\ formulas:\ \ \ x_1+x_2=- \frac{b}{a} \\\\x_1+x_2=- \frac{-1}{6} = \frac{1}{6}\\\\Ans.\ \ \ The\ sum\ of\ zeros\ is\ \frac{1}{6}[/tex]
Answer Link

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