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Mathematics 21 Online
OpenStudy (anonymous):

Find the product. (-d + 4)(-d - 4) = d^2-8d-16?

OpenStudy (tyteen4a03):

Hint: \(a^2 - b^2 = (a+b)(a-b)\)

OpenStudy (anonymous):

am i correct?

OpenStudy (tyteen4a03):

You are not - check out my identity above.

OpenStudy (anonymous):

i beg to differ lol

OpenStudy (uri):

(-d + 4)(-d - 4) -d(-d-4) +4(-d-4) d^2+4d-4d-16 Always remember -4d+4d will be cancelled.

OpenStudy (anonymous):

oh sorry tyteen4a03

OpenStudy (anonymous):

d^2-16?

OpenStudy (uri):

Yes.

OpenStudy (anonymous):

thank you

OpenStudy (tyteen4a03):

@TheGstudent23 You can't differ from identities. :)

OpenStudy (anonymous):

woah this was awhile a go but i bet it would be funny if i understood it

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