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3 years ago

Multiply 2+√10 by its conjugate and simplify.

Mathematics

1 answer:

krok68 [10]3 years ago

6 0

$\left(2+\sqrt{10} \right)\left(2-\sqrt{10} \right)\\\\=2^2-\left(\sqrt{10} \right)^2\\\\=4-10\\\\=-6$

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