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Square root of 4x squared times square root of 20x squared
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Square root of 4x squared times square root of 20x squared

User Bhavs
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isn't square root of 4X =4X squared and the square root takes away the square and leaves it as 4Xso there for 20 squared and rooted=20X thus making it 4X times 20X makingX=80
User Keith Jackson
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