exam Maths Puzzle Numerical Ability

Can you please help me? The problem is the square root of X squared to the third power equals 9. Can you show me how to work this out step by step?

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exam Other Question

Find (inline equation)x for the following set of numbers:
-3.5, -1.4, -0.5, 3, 5, 1, 2
2x+3y=6 x= -1