If then .
But we have to choose the positive root, so
If then which has no real roots because the discriminant is negative.
I have a question which is apparently worth 4 marks (of 10!) which states that there is a possible 4 answers for the following:
Solve to which I simply worked out by expanding the LHS to and thus
I have no idea what other way I can look at this, so what am I missing?