Answer:
63
Step-by-step explanation:
(8b+1)(8b-1)
8b+1=9b
8b-1=7b
9b*7b=63
btw (* stands for multiplication)
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Answers & Comments
Answer:
63
Step-by-step explanation:
(8b+1)(8b-1)
8b+1=9b
8b-1=7b
9b*7b=63
btw (* stands for multiplication)