1) calcule x2- 4=0 a) x= -1 x= -2 b) x= 2 x= -2 c) x= -1 x= 2 d) x=3 x= 2 2) calcule x2+2-x=0 a) x= -1 x= -2 b) x= 1 x= -2 c) x= 2 x= 3 d) x= 2 x= 4 3) calcule x2 - 5x + 6 = 0 a) x= -3 x= -2 b) x= 3 x= 2 c) x= 1 x= 2 d) x= 2 x= -1 4) calcule x2 - 2x =0 a) x= 2 x= 1 b) x= 1 x= -1 c) x= 2 x= -2 d) x= -1 x= -1 5) calcule x2-5x+6=0 a) x= 3 x= 2 b) x=1 x= 2 c) x=3 x= 4 d) x= 2 x= -2 6) calcule 2x2+5x+2=0 a) x= -1/2 x= -2 b) x= -3 x= 2 c) x= -4 x= 1/2 d) x= 3 x=1/2 7) calcule x2 + 10x + 25 = 0 a) x= 5 x= 5 b) x= 3 x= 1 c) x= 5 x= -5 d) x= -5 x= -5 8) calcule 3x2-5x+2=0 a) x= 2 x= 1/3 b) x= 1 x= 2/3 c) x= 1/3 x= 2 d) x= 1 x= 1 9) calcule x2+3x+2=0 a) x= 2 x= -1 b) x= 2 x= 1 c) x= -2 x= -3 d) x= -1 x= -2 10) calcule 5x2-20x+15=0 a) x= 4 x= -1 b) x= 2 x= 2 c) x= 3 x= 1 d) x= -2 x= 1 11) calcule 5x2-15x-50=0 a) x= -5 x= -2 b) x= 5 x=-2 c) x= 2 x= 2 d) x= 1 x= 5 12) calcule x2-5x-84=0 a) x= 8 x= 13 b) x= 12 x= -7 c) x

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