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what is the factored form of the expression t^2-81

A. ( t + 9 ) ( t - 9 )
B. ( t + 81 ) ( t - 81 )
C. ( t + 9 )^2
D. ( t - 9 )^2

I believe it's A, but I'm not sure. Please help.

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mariahmendez
The answer to this question is (t+9)(t-9)
t²-9²
t²-9²=(t+9)(t-9) apply difference of squares rule
(t+9)(7-9)



I hope this helps!!!!!!!!!!
meepville666
The answer is A.) (t + 9)(t - 9)

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