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Solving quadratic equations by factoring
- Intro Lesson: a4:25
- Intro Lesson: b6:19
- Lesson: 1a6:32
- Lesson: 1b3:37
- Lesson: 2a3:01
- Lesson: 2b3:24
- Lesson: 2c6:21
- Lesson: 2d2:43
Solving quadratic equations by factoring
Review the chapter on "Factoring" to refresh your memory if you don't quite remember how to factor polynomials. It will definitely help you solve the questions in this lesson!
Basic Concepts: Factoring polynomials: ax2+bx+c, Factoring perfect square trinomials: (a+b)2=a2+2ab+b2 or (a−b)2=a2−2ab+b2, Find the difference of squares: (a−b)(a+b)=(a2−b2), Solving polynomial equations
Related Concepts: System of linear-quadratic equations, System of quadratic-quadratic equations, Graphing quadratic inequalities in two variables
Lessons
Difference of Squares: a2−b2=(a+b)(a−b)
- Introductiona)Solve by factoring a trinomial: 2x2−12x+10=0b)Solve by factoring a difference of squares: 25x2−49=0
- 1.Solve by Factoring a Trinomial
Solve each equation by factoring.a)3x2+x−10=0b)7x2+35=−42x - 2.Solve by Factoring a Difference of Squares
Solve each equation by factoring.a)x2−36=0b)36x2−25=0c)12x3−75x=0d)40−10x2=0
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20.
Solving Quadratic Equations
20.1
Solving quadratic equations by factorising
20.2
Solving quadratic equations by completing the square
20.3
Using quadratic formula to solve quadratic equations
20.4
Nature of roots of quadratic equations: The discriminant
20.5
Solving polynomial equations by iteration
20.6
Applications of quadratic equations