anonymous
  • anonymous
Use the discriminant to determine how many x-intercepts the graph of the equation has. y = – 4x2 + 3x – 2 A. three B. one C. two D. none
Mathematics
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anonymous
  • anonymous
Use the discriminant to determine how many x-intercepts the graph of the equation has. y = – 4x2 + 3x – 2 A. three B. one C. two D. none
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
anonymous
  • anonymous
inst it A
ChillOut
  • ChillOut
All right, so the discriminant of a quadratic equation of form ax²+bx+c is given by \(\Delta=b^{2}-4ac\)

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anonymous
  • anonymous
i'm getting three as the answer.
anonymous
  • anonymous
@DecentNabeel ? what do you think
LynFran
  • LynFran
none
anonymous
  • anonymous
is she correct @DecentNabeel ?
anonymous
  • anonymous
well i need proof
anonymous
  • anonymous
hld on help me with 2 more and i will give you the medals
LynFran
  • LynFran
check the graph at the bottom of this link https://www.symbolab.com/solver/trigonometric-equation-calculator/-4x%5E%7B2%7D%2B3x-2%3D0/?origin=enterkey
ChillOut
  • ChillOut
All right. Here's the thing. If the discriminant is over 0, it has 2 roots. If it's 0, one root. And below 0, complex roots.
ChillOut
  • ChillOut
As your discriminant is over 0, it should have 2 roots (x intercepts).
ChillOut
  • ChillOut
Oh, nevermind. I just did the calculation and it yields -23. So there are no real roots.
anonymous
  • anonymous
you were right @LynFran

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