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Maurice Cunningham
Mathematics
12 May, 01:30
R^2 - 4r - 77 = (r + ?) (r + ?)
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Tianna Larsen
12 May, 01:31
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R^2 - 4r - 77 = (r + - 11) (r + 7)
or = (r - 11) (r + 7)
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