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Watch Video on Sum and Product of Roots - Algebra 2 Help
From
yourteachermathhelp
Published 16 months ago
To access the complete lesson on this topic, go to http://www.yourteacher.com. Students learn the sum and product of roots formula, which states that if the roots of a quadratic equation are given, the quadratic equation can be written as 0 = x^2 --... more
To access the complete lesson on this topic, go to http://www.yourteacher.com. Students learn the sum and product of roots formula, which states that if the roots of a quadratic equation are given, the quadratic equation can be written as 0 = x^2 -- (sum of roots)x + (product of roots). For example, to write a quadratic equation that has the given roots --9 and 4, the first step is to find the sum and product of the roots. Since the sum of the roots is --5, and the product of the roots is --36, the quadratic equation can be written as 0 = x^2 -- (-5)x + (-36), which simplifies to 0 = x^2 + 5x -- 36. less
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