anonymous
  • anonymous
What is the possible discriminant of the graph?
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
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jim_thompson5910
  • jim_thompson5910
The parabola has two x-intercepts, so there are two real solutions. This means that the discriminant is some positive number.
jim_thompson5910
  • jim_thompson5910
The actual equation is (x-2)(x+4) = x^2 +2x -8 So the discriminant of the polynomial x^2+2x-8 is D = b^2 - 4ac D = (2)^2 - 4(1)(-8) D = 36 So the discriminant is 36

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jim_thompson5910
  • jim_thompson5910
Luis you have a typo on the last line, but everything else is correct.
anonymous
  • anonymous
It's obviously that discriminant > 0

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