Quadratic Formula

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What is the quadratic formula?

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Tags

CCSS.HSA-REI.B.4B

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a = 4, b = 11, c = -108.

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a = 2, b = -8, c = -42.

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a = 4.

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b = 18.

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c = 2.

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What does the discriminant (b^2 - 4ac) tell us about a quadratic equation?

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The discriminant determines the nature of the roots: if > 0, two distinct real roots; if = 0, one real root; if < 0, no real roots.

Tags

CCSS.HSA-REI.B.4B

Front

How do you determine if a quadratic equation opens upwards or downwards?

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Tags

CCSS.HSF-IF.C.7A

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Front

What is the axis of symmetry for a quadratic function?

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