Quadratic formula is the best tool for solving quadratic equation. In algebra in mathematics high school, a lot of my student always have troubles about how to solve quadratic equation by graphs, factorisation and formula. So this video, I hope you can get more understand for this topics.

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What is quadratic equation?

In algebra, a quadratic equation (from the Latin quadratus for “square“) is any equation having the form


where x represents an unknown, and ab, and c represent known numbers such that a is not equal to 0. If a = 0, then the equation is linear. The numbers ab, and c are the coefficients of the equation, and may be distinguished by calling them, respectively, the quadratic coefficient, the linear coefficient and the constant or free term.

Because the quadratic equation involves only one unknown, it is called “univariate“. The quadratic equation only contains powers of x that are non-negative integers, and therefore it is a polynomial equation, and in particular it is a second degree polynomial equation since the greatest power is two.

Quadratic equations can be solved by a process known in American English as factoring and in other varieties of English as factorising, by completing the square, by using the quadratic formula, or by graphing.

The video sharing basic algebra for international student who learn in IB program, A level, pre Sat and IGCSE program. Some topics is connected to this topic like: exponential, word problem, or make systems of equations from text will be apply for , so that would be the best way if you can master this topic and do it to another math.


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