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- Quadratic Equations and Inequalities

Still Confused?

Try reviewing these fundamentals first.

Still Confused?

Try reviewing these fundamentals first.

Nope, I got it.

That's that last lesson.

Start now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started Now- Intro Lesson7:19
- Lesson: 17:16
- Lesson: 23:56
- Lesson: 36:00

Not sure if you should solve the quadratic equation by factoring or completing the square? No worries. You can always use the quadratic formula. The beauty of the quadratic formula is that it can always give you the answer no matter if the quadratic equations can be factored or not.

Basic concepts: Quadratic function in general form: $y = ax^2 + bx+c$, Shortcut: Vertex formula, Multiplying and dividing radicals,

Related concepts: System of quadratic-quadratic equations, Graphing quadratic inequalities in two variables, Graphing systems of quadratic inequalities, Conics - Parabola,

For the quadratic equation: $a{x^2} + bx + c = 0$

the solutions are: $x = \frac{{ - b\; \pm \;\sqrt {{b^2} - 4ac} }}{{2a}}$

- IntroductionSolve the equation using the quadratic formula:

$2{x^2} - 12x + 10 = 0$ - 1.
**Solving a quadratic equation with TWO REAL SOLUTIONS**

Solve using the quadratic formula: $x^2+10x+6=0$ - 2.
**Solving a quadratic equation with ONE (REPEATED) REAL SOLUTION**

Solve using the quadratic formula: $9x^2+25=30x$ - 3.
**Solving a quadratic equation with TWO COMPLEX SOLUTIONS**

Solve using the quadratic formula: $-3x^2-24x=49$

15.

Quadratic Equations and Inequalities

15.1

Solving quadratic equations by factorising

15.2

Solving quadratic equations by completing the square

15.3

Using quadratic formula to solve quadratic equations

15.4

Nature of roots of quadratic equations: The discriminant

15.5

Applications of quadratic equations

15.6

Solving quadratic inequalities

We have over 1340 practice questions in Secondary 4 Maths for you to master.

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