Subtract (x3power+3x2second power)-(-2x second power-9)

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14-03-2017
Mathematics

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Subtract (x3power+3x2second power)-(-2x second power-9)

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riveraalexiscar riveraalexiscar · Answer 1 · 2017-03-14T16:34:26+01:00

riveraalexiscar riveraalexiscar

14-03-2017

D = 4 - 4*9*(-7) = 4 + 252 = 256 = 16*16
x1 = (-2 + 16)/9 = 14/ 9
x2 = (-2 - 16) / 9 = -2

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