Résoudre l'inéquation : 4x²+20+21 = 0
Delta= 400-336=64
x1= -20-8/8
x1= -28/8x1= -3.5
x2=-20+8/8
x2=-12/8
x2=-1.5
4x²+41=0
4x²=-41
x²=-41/4
x²=-10.25
x=-V10.25
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Delta= 400-336=64
x1= -20-8/8
x1= -28/8
x1= -3.5
x2=-20+8/8
x2=-12/8
x2=-1.5
4x²+41=0
4x²=-41
x²=-41/4
x²=-10.25
x=-V10.25