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To solve these eliminations, we must eliminate either the x's or the y's. Either is possible but let us start with the y's. There is 2y in the first equation and (-1)y in the second, so we will have to...

This is a quadratic equation and as such it has zero, one or two solutions depending on the value of the discriminant (b²-4ac). In this equation, a=3, b=-6 and c=2 so b²-4ac = 36-...

This is a quadratic equation so there are two main methods you can use to solve it- factorising and completing the square.

My preferred method and the on...

The  easiest way to see this is with an example. So let us take the curve:

    x = cos(2t) ,  y = sin(t) with a point P where t = pi/6

The grad...

With this question the first thing to help you tackle it would be write the number as digits, i.e.Forty-seven thousand, nine hundred and eighty-three = 47,983Now, you want this number to the nearest thous...