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Mathematics 7 Online
OpenStudy (anonymous):

Solve. x^2 - 8x + 4 = 0

OpenStudy (anonymous):

[-(-8)±√(8^2-4(4)]/(2) [(8)±√(64-16)]/(2) [(8)±√(48)]/(2) [(8)±4√(3)]/(2) 4±2√(3) 2(2±√(3))

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