Squares and Square Roots

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What is the square of 4?

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16

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CCSS.6.EE.A.1

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What is the square root of 25?

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5

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CCSS.8.EE.A.2

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4

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CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

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A perfect square is an integer that is the square of another integer.

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The square of a negative number is positive.

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CCSS.5.NBT.A.2

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The square root of a perfect square is an integer.

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CCSS.8.EE.A.2

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9

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CCSS.6.EE.A.1

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Squaring a number and then taking the square root returns the original number.

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CCSS.8.EE.A.2

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4

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CCSS.6.EE.A.2C

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(a - b)² = a² - 2ab + b².

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CCSS.HSA.APR.C.4