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OpenStudy (anonymous):
Factor Completely: 3x^2 − 21 3(x2 − 7) 3(x + 7)(x − 7) 3(x + 7)(x − 3) Prime
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OpenStudy (uri):
What is common in this?
OpenStudy (uri):
3 x 1=3 2 x 7=21 So. 3(x^2-7)
OpenStudy (anonymous):
3(x^2-7)
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