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Mathematics 18 Online
OpenStudy (anonymous):

Factor: 4x2 + 12x + 9 A. (2x + 3)2 B. (4x + 9)(x + 1) C. (2x + 1)(2x + 9) D. (2x + 3)(2x - 3)

sam (.sam.):

4x^(2)+12x+9 (x+(3)/(2))(x+(3)/(2)) (2x+3)(2x+3) (2x+3)^(2)

Directrix (directrix):

A. (2x + 3)^2 --> Perfect Square Trinomial

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