exam Maths Puzzle Numerical Ability

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Simplify (all positive exponents)
[(3^-3u^2w^-5)/(6^-1u^-1w^-2)]^-2

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exam Other Question

Given f(x)=2x+2, find f(-1)

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Solve for all values of b that make the trinomial a perfect square.

9-bx+9x^2