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Автор - ggg7890

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Ответ

Автор - aleksandrawolk2002

(1/4y-2z)^2=

=(1/4y)^2-2×1/4y×2z+(2z)^2=

=1/16y^2-yz+4z^2.


[/ - это дробь]

[^2 - это квадрат]

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