exam Maths Puzzle Numerical Ability

Hello. Can you please help me with these? This comes from my college algebra class. My problem is how to rationalize the denominator:

1. x/sqrt[x-1]-sqrt[x]
2. ((2/sqrt[2-x])

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exam Other Question

I have a question in geometry about coordinates and graphing, but I cannot exactly scan my book onto the computer, so can you try to find my book and problem? 8.) The length of a rectangle is fixed at 29 cm. What widths will make the perimeter greater than 92 cm?

The width must be greater than ______ cm