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- GCE O-Level A Maths
- Quadratic Equations and Inequalities
Solving quadratic inequalities
- Intro Lesson14:18
- Lesson: 18:30
- Lesson: 27:31
Solving quadratic inequalities
Basic Concepts: Solving quadratic equations by factoring, Solving quadratic equations by completing the square, Solving quadratic equations using the quadratic formula
Related Concepts: Graphing quadratic inequalities in two variables, Graphing systems of quadratic inequalities
Lessons
- Introduction
Solve:
i) x2+2x−15=0
ii) x2+2x−15≤0
iii) x2+2x−15 > 0
- 1.
Solve:
i) −2x2+x+3=0
ii) −2x2+x+3≥0
iii) −2x2+x+3 < 0
- 2.
Solve:
i) x2−10x+25=0
ii) x2−10x+25 > 0
iii) x2−10x+25 < 0
iv) x2−10x+25≤0
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11.
Quadratic Equations and Inequalities
11.1
Solving quadratic equations by factoring
11.2
Solving quadratic equations by completing the square
11.3
Using quadratic formula to solve quadratic equations
11.4
Nature of roots of quadratic equations: The discriminant
11.5
Applications of quadratic equations
11.6
Solving quadratic inequalities