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OpenStudy (anonymous):
Solve 2x2 - 8x = -7. negative 2 plus or minus square root of 2 negative 2 plus or minus 2 square root of 2 quantity of 2 plus or minus square root of 2 all over 2 2 plus or minus square root of 2 end root over 2
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hero (hero):
Hint: Complete the square
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