Question

$( \sqrt{201} + \sqrt{199)} \times ( \sqrt{201} - \sqrt{199)}$
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Answer 1

$\large\boxed{\boxed{\boxed{{ol\'a}}}}}$

$(\sqrt{201}+\sqrt{199})×(\sqrt{201}+\sqrt{199})$

$\sqrt{400}×\sqrt{400}$

$20×20$

$400$

Answer 2

Resposta:

$\left(\sqrt{201}+\sqrt{199}\right)\left(\sqrt{201}-\sqrt{199}\right)\\\\\mathrm{Aplicar\:a\:regra\:da\:diferenca\:de\:quadrados:\:}\left(a+b\right)\left(a-b\right)=a^2-b^2\\\\\left(\sqrt{201}\right)^2-\left(\sqrt{199}\right)^2\\\\\left(\sqrt{201}\right)^2-\left(\sqrt{199}\right)^2=2\\\\=2$