How to Make and Use a Sign Table - Video 1

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We learn how to make, construct, sign tables for quadratic functions, equations. This allows us to study the sign of any quadratic function and is often used to solve quadratic inequalities. The method is clearly explained with some detailed worked examples. This technique is used to determine values of x at which the function is positive, negative, or equal to zero. It is a must know for algebra, functions as well as calculus.
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I HAVE A QUESTION!Before the zero it's supposed to be the opposite sign, so at x-1 it must be +, +, - right or not?

otakulolo
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Please I'm looking forward to more of your videos in mathematics

Daniel-rfbf
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if x is negative we put + instead of - ?

alparkoszta