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jayda Group Title

Evaluate the discriminant of 25x2 + 350x + 49 = 0. Tell how many solutions the equation has and whether the solutions are real or imaginary. A. one real solution B. two imaginary solutions C. two real solutions D. cannot be determined

  • one year ago
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  1. NotTim Group Title
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    wat u think first

    • one year ago
  2. jayda Group Title
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    i honestly dont have a clue! ha

    • one year ago
  3. NotTim Group Title
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    oh shoot i forgot too. wats discriminant

    • one year ago
  4. jayda Group Title
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    i really dont know

    • one year ago
  5. binarymimic Group Title
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    \[x = \frac{ -b \pm \sqrt{b^{2} - 4ac} }{ 2a }\] the discriminant is \[\sqrt{b^{2} - 4ac}\] because it can be used to discriminate between solutions.

    • one year ago
  6. NotTim Group Title
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    oh. that's relatively simple then. Here's a hint: ax^2-bx-c=0 (minus sign is just there; it doesn't matter). works in conjunction with binarymimic's comment.

    • one year ago
  7. AccessDenied Group Title
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    The discriminant is actually a bit simpler, it's the radicand of that expression: \(b^2 - 4ac\) It is useful because the sign on it tells us whether there is a positive number or negative number under the radical. In the case of a positive, we have two real roots. In the case of a negative, we have two imaginary / complex roots. If we have 0, then we have a single root that is repeated. ((-b +- 0) / (2a))

    • one year ago
  8. ParthKohli Group Title
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    Actually, the discriminant is just \(b^2 - 4ac\).

    • one year ago
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