book Maths Puzzle Numerical Ability

I am not sure how to solve this one

ln (square root of x +4) =1

and

log base 2 (x-3) + log base 2x - log base 2 (x+2) =2

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book Other Question

Having trouble understanding this!


2) For the function y = x^2 - 6x + 8, perform the following tasks:
a) Put the function in the form y = a(x - h)^2 + k.
Answer:
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please solve and show process for:
2/7x-1/2x=3/4x+1