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Factorising is taking an expression of some sort and simplifying it down to its component parts so that they are presented in the simplest way possible. For example, take the expression (15pq + 10pqr). Fi...

If the answer is a decimal, you start from the left and ignore any 0s- only count numbers that are not 0. For example, 0.0002 is to 1 significant figure even though there are 3 zeros before the 2. If the ...

6x + xdy/dx + y + 2ydy/dx - 4 - 6dy/dx = 0xdy/dx + 2ydy/dx - 6dy/dx = 4 - 6x - ydy/dx (x + 2y - 6) = 4 - 6x - ydy/dx = (4-6x-y)/x+2y-6)

v^2 = u^2 +2as, v^2-u^2 = 2as, (v^2-u^2)/2*a = s, End

The first step is to multiply both side by 8, as this will cancel out the 8 that is beneath the 6-2x. This will then make the equation look like this: 8y = 6-2x. As we are making X the su...