exam Maths Puzzle Numerical Ability

Solve the rational inequality and submit in interval notation:

x-2/x+1 > x/x+2

I know how to get to one fraction,
-3x+4/(x+2)(x+1)
Then it becomes (after setting equal to

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exam Other Question

What is another way to write 8^2/3?Would it be the cube root of 8^2? How many positive real solutions are there in:
f(x)=x^4-4x^3+6x^2-4x+1
a)1 or 0
b)2 or 0
c)4 or 2
d)2 or 0