exam Maths Puzzle Numerical Ability

Given f(x)=x^2+2x+1 find f(x+h) and simplify how can i figure this out if only f is given to me and not h?

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exam Other Question

A line parallel to 3x-9y=4 and sketch the graph A bag contains 5 apples and 3 oranges. If you select 4 pieces of fruit without looking, how many ways can you get exactly 3 apples?
A) 60 ways B) 180 ways
C) 20 ways D) 30 ways
can you please explain!