Answer:
https://www.symbolab.com/solver/step-by-step/%5Cleft(9-c%5Cright)%5Cleft(9%2Bc%5Cright)?or=input
Step-by-step explanation:
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Answer:
https://www.symbolab.com/solver/step-by-step/%5Cleft(9-c%5Cright)%5Cleft(9%2Bc%5Cright)?or=input
Step-by-step explanation: