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Multiply 2+√10 by its conjugate and simplify.

Multiply 2+√10 by its conjugate and simplify.
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Multiply 2+√10 by its conjugate and simplify.

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User Wibeasley
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1 Answer

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\left(2+√(10) \right)\left(2-√(10) \right)\\\\=2^2-\left(√(10) \right)^2\\\\=4-10\\\\=-6

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User Daviesdoesit
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