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Mathematics

9th -

10thgrade

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Lesson 9-6 Quadratic Formula & Discriminant

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Tara Wasserstein

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30 questions

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  • 1. Multiple Choice
    15 minutes
    1 pt

    What is the quadratic formula?

    x=b−(b)2−4(a)(c)2(a)x=\frac{b-\sqrt{\left(b\right)^2-4\left(a\right)\left(c\right)}}{2\left(a\right)}

    x=−(b)±(b)2−4(a)(c)2(a)x=\frac{-\left(b\right)\pm\sqrt{\left(b\right)^2-4\left(a\right)\left(c\right)}}{2\left(a\right)}

    x=(b)±(b)2−4(a)(c)2ax=\frac{\left(b\right)\pm\sqrt{\left(b\right)^2-4\left(a\right)\left(c\right)}}{2a}

    x=−(b)±b±4(a)(c)x=-\left(b\right)\pm\sqrt{b\pm4\left(a\right)\left(c\right)}

  • 2. Multiple Choice
    15 minutes
    1 pt

    What is the formula for the discriminant of a quadratic equation?

     −b2a\frac{-b}{2a}  

     b2−4acb^2-4ac  

     ax2+bx+cax^2+bx+c  

     −b±b2−4ac2a\frac{-b\pm\sqrt{b^2-4ac}}{2a}  

  • 3. Multiple Choice
    15 minutes
    1 pt

    What does the discriminant tell us?

    The maximum or minimum

    The y-intercept

    The number of solutions

    The axis of symmetry

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