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OpenStudy (anonymous):
12. Solve. 9x2 - 21x + 15 = 0. x equals the quantity of 7 plus or minus i times the square root of 11 all over 6 x equals the quantity of 7 plus or minus the square root of 136 all over 6 x equals the quantity of negative 7 plus or minus i times the square root of 11 all over 6 x equals the quantity of negative 7 plus or minus the square root of 136 all over 6
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OpenStudy (anonymous):
which one?
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