Videos to help Algebra I students learn how to use the quadratic formula to solve quadratic equations that cannot be easily factored.

Students understand that the discriminant, b

New York State Common Core Math Module 4, Algebra I, Lesson 15

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Common Core For Algebra I

Lesson 15 Summary

You can use the sign of the discriminant, b^{2} - 4ac, to determine the number of real solutions to a quadratic equation in the form ax^{2} + bx + c = 0, where a ≠ 0. , where . If the equation has a positive discriminant, there are two real solutions. A negative discriminant yields no real solutions and a discriminant equal to zero yields only one real solution.

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