Question

subtract 3xy + 7zx from 5xy -2yx+10xyz​

Answer 1

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$5xy - 2yx + 10xyz - (3xy + 7zx )\\ \\ = 5xy -2yx + 10xyz - 3xy - 7zx \\ \\ = 5xy - 3xy - 2yx + 10xyz - 7zx \\ \\ = 2xy - 2yx + 10xyz - 7zx \\ \\ = 10xyz - 7zx \\ \\ = xz(10y - 7)$

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