exam Maths Puzzle Numerical Ability

help please! Let f(x)=x+2
write the function f(x)= |x+2| as a composition of the functions f and g.

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exam Other Question

The inverse of f(x) is h(x). The composition of f and h is written f[h(x)]. What does f[h(x)] equal?
Hint: Think of a simple problem like f(x) = x + 3. Then the inverse, h(x) wou I need help with 3x^2 - 2x + 1 = 0

I came out with x = 2/6 + sqrt 8/6

Did I do this right?

I see the answer, but am confused on what the "i" means?