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Mathematics 15 Online
OpenStudy (anonymous):

Find the product (-d + 4)(-d - 4)

OpenStudy (goformit100):

Multiply

OpenStudy (jwheele1):

Are you familiar with foil?

OpenStudy (jwheele1):

or the distributive property?

OpenStudy (jwheele1):

step one: |dw:1348759318894:dw|

OpenStudy (jwheele1):

what is -d *-d?

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