5m²-25m²+34mn
Step-by-step explanation:
A.T.Q(according to question)
(9m²-9n²+18mn)-(4m²+16n²-16mn)
=9m²-9n²+18mn-4m²-16n²+16mn
=9m²-4m²-9n²-16n²+18mn+16mn
=5m²-25m²+34mn
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Answers & Comments
5m²-25m²+34mn
Step-by-step explanation:
A.T.Q(according to question)
(9m²-9n²+18mn)-(4m²+16n²-16mn)
=9m²-9n²+18mn-4m²-16n²+16mn
=9m²-4m²-9n²-16n²+18mn+16mn
=5m²-25m²+34mn