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Mathematics 13 Online
OpenStudy (anonymous):

Factor completely: 9x^2 + 42x + 49 (3x + 7)(3x − 7) (9x − 7)(9x − 7) (3x + 7)(3x + 7) (9x + 7)(9x + 7)

OpenStudy (jasmineflvs):

first

OpenStudy (campbell_st):

its a perfect square... the 1st and last terms are squares... the middle term is positive so the \[(ax +b)^2 = a^2x^2 + 2abx + b^2\] just find a and b

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