Question

add (-6mn ),( -3mn + 5) , (7mn - 12 ), (-15mn + 15)​

Answer 1

Answer

-5mn+8

Step-by-step explanation:

Answer 2

Answer:

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Step-by-step explanation:

$(-6mn ) + ( -3mn + 5) + (7mn - 12 ) + (-15mn + 15) \\ \\ -6mn - 3mn + 15 + 7mn - 12 - 15mn + 15 \\ \\ mn( - 6 - 3 + 7 - 15) + 15 - 12 + 15\\ \\ mn( - 17) + 18 \\ \\ \implies \: \: - 17mn + 18$