Solving Quadratic Equations by Using The Quadratic Formula
Presentation
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Standards-aligned
Vanessa Espartero
Used 37+ times
FREE Resource
9 Slides • 2 Questions
1
Solving Quadratic Equations by Using the Quadratic Formula
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Objective:
Solve quadratic equation by: (d) quadratic formula
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The Quadratic Formula
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Steps:
1. Write the equation in standard form.
2. Identify the numerical values of the coefficients a, b, and c.
3. Write the quadratic formula.
4. Substitute the numerical values for a, b, and c in the quadratic formula.
5. Simplify to get the exact solution
6. Check the solution.
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Example 1: Solve x2 - x - 42 = 0 using quadratic formula.
Solution:
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Example 1: Solve x2 - x - 42 = 0 using quadratic formula.
Solution:
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Example 2: Solve x2 + 3x + 6 = 0 using quadratic formula.
Solution:
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Multiple Choice
Identify the value of a, b, and c given the quadratic equation 3x - 5x2 = 10.
a = 3
b = -5
c = 10
a = -5
b = 3
c = -10
a = -3
b = 5
c = -10
a = 10
b = -3
c = - 5
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Multiple Choice
Solve for x.
x2 + 3x - 4 = 0
x = 2 and x = - 2
x = - 4 and x = 1
x = 4 and x = - 1
x = -2 and x = -2
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Worktext Reference
Oronce O.A., Mendoza M.O. (2019). E-Math Worktext in Mathematics 9, Manila, Philippines: REX Bookstore Inc.
Reference
Nivera G.C., Lapinid M.R.C. (2018). Grade 9 Mathematics Patterns and Practicalities 9, Makati City, Philippines: Salesiana Books by Don Bosco Press,
Solving Quadratic Equations by Using the Quadratic Formula
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