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Lawrence Faulkner
Mathematics
22 May, 09:59
R^2+6r-27
factoring quadratics
+4
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1
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Eduardo
22 May, 10:17
0
(r + 9) (r - 3)
Step-by-step explanation:
r² + 6r - 27 =
= r² + 9r - 3r - 27
= r (r + 9) - 3 (r + 9)
= (r + 9) (r - 3)
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