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E -> (x-1)2 = 0
2x -2 = 0
2x = 2
x= 1
F -> x² = 1
x = √1
x = 1
G -> x² - 3x + 2 = 0
( x - 2 )( x - 1 ) = 0
x = 2 x = 1
( E n F ) u G
( 1 ) u 1,2
1,2