Question

(√x＋3√y) ^2 -6√xy упростите выражение​

Answer 1

$(\sqrt{x}+3\sqrt{y})^2-6\sqrt{xy}=(\sqrt{x})^2+2\cdot3\sqrt{xy}+(3\sqrt{y})^2-6\sqrt{xy}=\\\\=|x|+6\sqrt{xy}+9|y|-6\sqrt{xy}=\boxed{|x|+9|y|}$

Answer 2

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