graceparker graceparker

14-03-2017
Mathematics

Answered

Factor k2 - 81. I would love it if someone could help me

Verified Answer :

Anonymous Anonymous

14-03-2017

k2 - 81 = (k + 9)(k -9)

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Answer Link

charlottekrist charlottekrist

14-03-2017

Rewrite it in the form a^2-b^2, where a=k and b=9
k^2-9^2

2. Use difference of squares: a^2-b^2 = (a+b)(a-b)
(k+9)(k-9)

Answer Link

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