Multiply 2+√10 by its conjugate and simplify.

asked Aug 14, 2023 211k views

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

Daviesdoesit answered Aug 20, 2023

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