Find the sum of 12m+8n-3mm, 7-3m-8n+6mm, 2mn
Answers
Answered by
2
Step-by-step explanation:
12m+8n-3mn+7-3m-8n+6mn+2mn
8m-5mn is the right answer
Answered by
0
Answer: =189m
3
−9n
3
−54m
2
n−36mn
2
Step-by-step explanation: (6m−n)(36m
2
+6mn+n
2
)−(3m+2n)
2
=(6m−n)[(6m)
2
+6m×n+(n)
2
]−(3m+2n)
3
=[(6m)
3
−n
3
]−[(3m)
3
+(2n)
3
+3×3m×2n(3m+2n)]
=(216m
3
−n
3
)−(27m
3
+8n
3
+54m
2
n+36mn
2
)
=216m
3
−n
3
−27m
3
−8n
3
−54m
2
n−36mn
2
=189m
3
−9n
3
−54m
2
n−36mn
2
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