Question

разложите на множители $20x^3y-5x^7y$

Answer 1

Ответ:

$5x^{3}y(\sqrt{2}-x)(\sqrt{2}+x)(2+x^{2})$

Объяснение:

$20x^{3}y-5x^{7}y=5x^{3}y(4-x^{4})=5x^{3}y(2-x^{2})(2+x^{2})=5x^{3}y(\sqrt{2}-x)(\sqrt{2}+x) \cdot$

$\cdot (2+x^{2});$

Answer 2

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