exam Maths Puzzle Numerical Ability

Can you help me solve this equation for real solutions?

x^3-6x+3=0

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exam Other Question

Multiply (4)(-3/2)

The -3/2 have the longated parenthesis, I am still not sure what I am supposed to do when they are the longer kind can someone help please? Hi this problem is fo equations and inequalities with fractations:
Solve for X
Thank you in advance:

2x +1 / x-2 ≥ 0