Math

posted by .

I am stumped could someone please explain this problem?
Give the solutions to the following quadratic equation by examining the graph of the related quadratic function:
Graph: y=x^2+2x-15
Equation: x^2+2x-15=0
Thanks so much.

  • Math -

    algebraic solution:
    (x+5)(x-3) = 0
    so x = -5 or x = 3

    When you graphed it, did you not get a parabola that opened upwards and crossed the x-axis at -5 and 3 ?

  • Math -

    We can't draw graphs for you; you can and should do that yourself.
    Since the equation can be factored to (x+5)(x-3) = 0,
    the solutions are x=-5 and +3.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Quadratic Functions

    Please explain to me how to do the following problems, I don't understand them. Thanks! Find the x-intercepts (if any) for the graph of the quadratic function. 1.f(x) = (x + 2)2 - 4 Find the y-intercept for the graph of the quadratic …
  2. MATH

    Sketch the graph of a quadratic function for which the related quadratic equation has only one solution. Then, sketch one that has two solutions. Explain how you know by looking at the graph the number of solutions there are.
  3. ALGEBRA

    What does it mean to give the solutions to the following quadratic equation by examining the graph of the related quadratic function: Graph: y = x^2 + 2x - 15 Equation: x^2 + 2x - 15 = 0
  4. Math

    I am stumped on this problem could someone please help?
  5. math

    State the solutions, or estimated solutions, to each quadratic equation in Exercises 23–26 by examining the graph of the related quadratic function equation 2x2 - 3x - 4 = 0 and Graph:y=2x^2-3x-4 Can someone help me with this
  6. math

    Sketch the graph of a quadratic function for which the related quadratic equation has only one solution. Then, sketch one that has two solutions. Explain how you know by looking at the graph the number of solutions there are.
  7. Math

    I can't remember how you find the roots of quadratic equations other than determining the zeroes of the equation and finding the x-intercepts. Can someone please give me a clear answer on this as my dad has been useless on this topic …
  8. math

    How are the real solutions of a quadratic equation related to the graph of the quadratic function?
  9. math

    How are the real solutions of a quadratic equation related to the graph of the quadratic function?
  10. Algebra 2

    How are the real solutions of a quadratic equation related to the graph of the quadratic function?

More Similar Questions