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First write down the series of numbers e.g.  8,  12,  16,  20.

Calculate the difference between each term in the series 12-8 = 4, 16-12 = 4,  20-16 = 4 This shows that the expression will begin wit...

Whenever faced with a quadratic equation in the form of AX^2 + BX + C = 0, the first thing you do is factorise it, which will look something like this: (X )(X ) = 0.You can see from this that when you mul...

(x-5)(2x-3)= 2x² -3x-10x+15

= 2x² -13x + 15

If we know that y is proportional to x² then we using the given values we can write 75= 5² --> 75=25, however this is obviously not true but all that remains is to multiply the 5<...

The objective of the question is to find an answer to x = ?, where ? is a number.

Start by 'moving' all the x's to one side of the equals sign and all the numbers to the other. This can be done by ...