Simplify square root of 324-3 square root of 225

Math
324-3225
Simplify each term.
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Rewrite 324 as 182.
182-3225
Pull terms out from under the radical, assuming positive real numbers.
18-3225
Rewrite 225 as 152.
18-3152
Pull terms out from under the radical, assuming positive real numbers.
18-3⋅15
Multiply -3 by 15.
18-45
18-45
Subtract 45 from 18.
-27
Simplify square root of 324-3 square root of 225

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