Question 625623
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That answer is actually right. But you can also simplify it by prime factoring -54. Doing that, we get {{{sqrt(3^3*2*-1)}}}. We take the perfect square and the -1 out, we get {{{sqrt(3^2)*sqrt(3*2)*sqrt(-1)}}}. Simplify further and we end up with {{{9sqrt(6)i}}}.
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