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a)x² -8x +15 = 0
b)x² +10x +25 = 0
c)3x² +4x +1 = 0
d)-x² +12x -20 = 0
e)x² -8x +12 = 0
a)x² -8x +15 = 0
b)x² +10x +25 = 0
c)3x² +4x +1 = 0
d)-x² +12x -20 = 0
e)x² -8x +12 = 0
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