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Mathematics 11 Online
OpenStudy (anonymous):

use either completeing the square of the quadratic formula to solve the following expression. 9x^2-x^2 = x^2+4x-1

OpenStudy (anonymous):

7x^2 + 4x -1 = 0 quad formula x (-2 - Sqrt[11]) / 7, x = (-2 + Sqrt[11]) / 7

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