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OpenStudy (anonymous):
Simplify the following expression. (3x + 7)2 A. 9x2 + 49 B. 9x2 + 42x + 49 C. 9x2 + 21x + 49 D. 9x2 - 49
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OpenStudy (anonymous):
@nnn!!!
OpenStudy (anonymous):
B. 9x2 + 42x + 49
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