exam Maths Puzzle Numerical Ability

perform indicated multiplication and simplify
(rs)radical sign

(rs)13*(rs)5

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exam Other Question

Solve and check for x.

x/x-2 - x+1/x = 8/x^2-2x

I don't know how to find the LCD. Can you help? Hi May I have some help with finding solutions to this equation?

Find all real solutions of the following equation. (If there are extra answer boxes, enter NONE.)
x^5 + 216x^2 = 0