A16x^2 - 56xy + 49y^24^2x^2 - 2 • 4x • 7y + 7^2y^2(4x)^2 - 2 • 4x • 7y + (7y)^2=(4x-7y)^2...

Mathematics, 20.09.2020 05:01, marissa2367

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