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Rearrange to get x^2 - 9x - 36 <= 0 Solve quadratic (x-12)(x+3) <= 0 Solve for x x = 12, x = -3

Now, we have key points 12 and -3, we need the range of values for x where x^2 - 9x - 36 &...

I understand this feeling, as German is, compared to English, very complex. However, we will start building up your knowledge like a house. We will start with the basics - e.g., conjugation - and won't pr...

This result comes from using a trig identity and the quotient rule. First, we write tan(x) as sin(x)/cos(x). Then we apply the quotient rule. After doing the standard derivatives, the numerator of our fra...

As with any language, practising is the most important part. However, quickly scanning the questions and then write down or make a note of the key words that you have to pay attention to. For example, if ...

To produce a good reliable study, you would first need a sufficient number of participants to represent the actual population. Therefore a large sample size (number of participants in the study) would pro...