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The first thing that we are going to do to tackle this problem is to expand the bracket on the left-hand side (3(m+4)). To do this you have to multiply each of the terms inside the bracket with the 3 that...

Subtract 2) from 1), we get x = 3. This means that y must be 2.

Step 1: Put all the surds in to the form a√2. Starting with √98 try and work out what numbers multiply together with 2 to get 98 (2x49). Therefore √98=√(2x49). As 49 is a square number yo...

1 x 10^-9

= 14x+21y-14x+xy

=y(21+x)