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If a quadratic equation is of the form ax²+bx+c, calculate D (Discriminant) whose value is b²-4ac. 

If the value of D is negative, the equation has imaginary roots.<...

To find the mean you must add all of the numbers together (2+5+6+12+5) and divide by how many numbers you have in your data set (5). Mean = 30 : 5 = 6

To find the median you must f...

When we factorise, we do so to make the expression more simple. Factorising is when we take common factors from the expression and group them together, and then multiply these common factors by somethi...

Because the highest power of X is 2, this is a Quadratic Equation

When factorised, these look like 

       (x + a)(x + b)                 where a & b ar...