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OpenStudy (anonymous):
18r^2-20r+2
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OpenStudy (kira_yamato):
jhonyy9 (jhonyy9):
r_1,_2=(20+/- sqrt(400-144))/36=(20+/-sqrt(256))/36=(20+/-16)/36=4/36=1/9 and 36/36=1 r_1=1/9 r_2=1
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