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Solving Quadratic Formula using the discriminant.

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Presentation on theme: "Solving Quadratic Formula using the discriminant."— Presentation transcript:

1 Solving Quadratic Formula using the discriminant

2 Quadratic formula using the discriminant Examples: Step 1: Write equation in Standard Form Ax ² + Bx + C = 0 x² + 4x + 3 = 0 4x² + 8x + 3 = 0 3x² + 6x = 0

3 Quadratic formula using the discriminant Step 2: Find A,B and C x² + 4x + 3 = 0 C= 3 3x² + 6x = 0 A=3 B= 6 C= 0 4x² + 8x + 3 = 0 A=4 B= 8 C= 3 A=1B= 4

4 Quadratic formula using the discriminant Is the discriminant. If b²-4ac is positive, then the equation has 2 answers. If b²-4ac is 0, then the equation has 1 answer. If b²-4ac is negative, then the equation has no real solution. Rational Irrational Rational

5 Solving Quadratic Equations by using Graphing Calculator CW Problem # 15 When you enter the expression into the calculator your going to have to use double parenthesis. Then use 2 nd enter to get the minus answer.


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