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b/a = -6 / 2 = -3 .........a - b = 2 - (-6) = 8 ............ab = 2 x -6 = -12 ...............Therefore ab, -12, has the smallest value.

First, you need to look at the x² term and the number 10 - find all the factors of these numbersThe number before x² is 1, and since 1 is a prime number, the only factor is 1. 1=1x1A...

The first thing to do in such a question is to draw out the information you have been given. Not only does this help to process the question again, so that no vital information is missed,...

rearrange the first equation so it reads y= 5x+y= 21 y=21-5xSubstitute this y value into the second equation x-3y=9 y=21-5x x-3(21-5x)=9Expand out the bracket and rearrange to find out w...

Depending on the expression how to expand and simplify is different. Commonly for two brackets back to back these are expanded by the FOIL method. Multiply together the two first parts of the brackets, th...