algebra 2

posted by .

How do you find the discriminant of 3x2+2x-7 and what does it tell you about the equation?

  • algebra 2 -

    for 3x^2 + 2x - 7 = 0

    discr = 4 -4(3)(-7) = +88

    so you have real roots, both irrational

  • algebra 2 -

    b^2-4ac

    2^2 -4(3)(-7)

    4 + 84 = 88 = 8*11

    It tells you that there are two real roots because the discriminant is positive and that the roots will not be whole numbers because there will be a square root of 11 involved.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra

    Find the discriminant and solutions for the following equations. #1) 9x^2+6x+1=0 #2) -2x^2+3x-2+0 I will be happy to critique your work. what is b^2-4ac?
  2. algebra

    What would be the discriminant for this equation: x^2-2x+12=0 How many solutions are there?
  3. Precalculus(URGENT)

    compute the discriminant of the equation.What does the discriminant indicate about the kinds of solution?
  4. algebra 2

    1) In the general second-degree equation Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0, what is the discriminant and what does it tell you about the graph of the equation?
  5. Trigonometry

    Help trig question involving discriminant?
  6. Algebra 2

    Evaluate the discriminant of each equation. Tell how many solutions each equation has and whether the solutions are real or imaginary. y=9x^2 - 24x y=-2x^2 + 3x - 5 y=-4x^2 - 4x - 1
  7. algebra

    Can someone please explain What polynomial has a graph that passes through the given points?
  8. math 2

    Julie is solving the equation 3x2 + 5x + 15 = 0 and notices that the discriminant b2 - 4ac has a value of -155. This tells her that the equation has
  9. math

    Which statement concerning the equation x^2+2=x is true?
  10. Algebra

    Determine the discriminant for the quadratic equation -3 = x^2 + 4x + 1. Based on the discriminant value, how many real number solution does the equation have?

More Similar Questions