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Mathematics 9 Online
OpenStudy (anonymous):

Fan and Medal What number should be added to the expression x^2 + 6x to change it into a perfect square trinomial? A. 3 B. 6 C. 9 D. 12

OpenStudy (harsha19111999):

C. 9 if you add 9, you can factorize it

OpenStudy (anonymous):

yes he is correct :) x^2+6x+9 =(x+3)^2

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