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64-81d^2 How do I do this?

64-81d^2 How do I do this?
asked 221k views
2 votes
64-81d^2
How do I do this?

asked
User William Herry
by
8.3k points

1 Answer

2 votes

It is not clear what you want.

64=8²

81d²=(9d)²

64-81d²=8²-(9d)²=(8-9d)(8+9d)

Is this OK?

answered
User Paul Diston
by
8.0k points
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