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Unformatted text preview: 6 x7 Discriminant of a Quadratic • The Discriminant is: • The Discriminant is a quick tool to see how many solutions exist. x =b ± b 24 ac 2 a b 24 ac Discriminant Information Value # Solutions Graph D > 0 Two Real ? D = 0 One Real ? D < 0 No Real ? Two Imaginary D = b 24 ac ⇒ ⇒ ⇒ Using The Discriminant • Determine the type AND the number of solutions: x 2 + 6 x + 8 = You Try! • Find the Discriminant of the following equations: 5 4 8 2= x x y 1 6 9 2 += x x y Homework • P.289 1  5, 11, 14, 22, 23, 34  37, 5759, 66 Extra Credit ( Use a separate sheet of paper ) p. 291 68c, 69, 70 SHOW YOUR WORK! SHOW YOUR WORK! SHOW YOUR WORK! SHOW YOUR WORK!...
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This note was uploaded on 05/13/2011 for the course MTH 98 taught by Professor Johnson during the Fall '09 term at Grand Valley State.
 Fall '09
 Johnson
 Algebra, Quadratic Formula

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