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Mathematics 21 Online
OpenStudy (anonymous):

Is 9x2 + 54x + 81 a perfect square trinomial? Justify your answer. You may use "^" to indicate an exponent. For example, x2 can be typed in as x^2

OpenStudy (alekos):

you can start by factoring out the 9 9(x^2+6x+9) what do you think we should do next?

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