Question

subtract 3xy + 5yz -72x from 6xy -2zx +20xyz​

Answer 1

Answer:

$6xy - 2zx + 20xyz - (3xy + 5yz - 72x) \\ \\ = 6xy - 2zx + 20xyz - 3xy - 5yz + 72x \\ \\ = 6xy - 3xy - 2zx - 5yz + 20xyz + 72x \\ \\ = 3xy - 2zx - 5yx + 20xyz + 72x \\ \\ = x(3x - 2 - 5y + 20yz + 72)$

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