What is the first quartile value of 16 18 20 14 17 27 33 9 12

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

Evaluate cos2θ for cosθ = square root of 3/2

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