Answer:
1.m^2 + 9 − 9 − 8 1
2.(5a-6b) (5a+6b)
3.9c^4-121d^9
Step-by-step explanation:
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Answer:
1.m^2 + 9 − 9 − 8 1
2.(5a-6b) (5a+6b)
3.9c^4-121d^9
Step-by-step explanation: