exam Maths Puzzle Numerical Ability

Divide. Then simplify by taking roots, if possible. Assume that all expressions under radicals represent positive numbers.

root ( 3, 270a^7b^5 ) / root ( 3, 10a^5b^4 )

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exam Other Question

Hi May I have some help solving this problem?

Find a point on the y-axis that is equidistant from the points (8, -8) and (2, 2). Would you please help me with this problem ;0).
x over x-2, subtract x+1 over x = 8 over x^2-2x

I think the LCD is x^2-2x. I am lost from here. Thank you for your help.