exam Maths Puzzle Numerical Ability

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

9-bx+9x^2

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exam Other Question

How do i do this?

Simplify (all positive exponents)
[(3^-3u^2w^-5)/(6^-1u^-1w^-2)]^-2 directions: find angle x. the first to angles are 116 degress and the other angle is 37 degress. my answer was 27 degress. am i correct?