GCSE Edexel maths completing the squareWatch
As RDKGames has mentioned (in the second post of this discussion), (25/16) was multiplied by 2 to obtain (25/8):
Best to stick with fractional representation for this question as you may deal with non-ending decimal representations and it is clearer with fractions.
Also, on the third line of your script:
You have forgotten to square the (x + 1.25) term on this line and the lines afterwards.
Yes it is:
Yes but it is best to break down (50/16) to (25/8) so to be easier to malipulate the other terms.