exam Maths Puzzle Numerical Ability

Could you please help me with my problem?

Solve the equation
square root x-2=1

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exam Other Question

Find the perimeter of the triangle. one side is 3, one side is radical 3 - radical 2, the other side is radical 3 + radical 2. woooosh over my head, please help me. Subtract and Simplify

((2-y)/(y-4))-((9y-4)/(4-y))

Thank you I really need help with this!!!