exam Maths Puzzle Numerical Ability

what is the the square root of 28n squared?

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exam Other Question

Perform the indicated operation and simplify: Ok so not sure about this one. Not even sure to put a square root symbol in this box.

-3 square root 54 + 7 square root 24 Reduce expression to the lowest terms.
-2x-8
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x^2+2x-8