\"\"

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One square root of x is \"\". \ \

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\"\"

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\"\"      (Take square to each side) \ \

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\"\"               (Cancel root and square) \ \

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\"\"                     (Simplify: \"\")

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So, \"\"

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So, the other number is +9.

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\"\"

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The other number is +9.

\

The value of x is 81.