A=2V3+V75-6V27=2V3+V25 xV3-6V9 x V3=2V3+5V3-18V3=-11V3
B=3V12/2= 3V4V3/2=6V3/2=3V3
2) (3V7-2V5)²=(3V7)²-2x3V7 x 2V5 +(2V5)²=63-12V35+20=83-12V35
3) x²=8 x=+V8 et x=-V8 x=V4 . V2= 2V2
x=2V2 et x=-2V2
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A=2V3+V75-6V27=2V3+V25 xV3-6V9 x V3=2V3+5V3-18V3=-11V3
B=3V12/2= 3V4V3/2=6V3/2=3V3
2) (3V7-2V5)²=(3V7)²-2x3V7 x 2V5 +(2V5)²=63-12V35+20=83-12V35
3) x²=8 x=+V8 et x=-V8 x=V4 . V2= 2V2
x=2V2 et x=-2V2