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Bonsoir
6x²+13x-6 = -63
6x²+13x-57 = 0
delta = b²-4ac = (13)²- 4(6)(-57) = 1537
Vdelta = 39.20
deux solutions
x ' = (-b-Vdelta)/2a = (-13-39.2)/12 = -4.35
x" = (-b+Vdelta)/12 = 2.18
Bon courage ...
6x²+13x-6 = -63
6x²+13x-57 = 0
delta = b²-4ac = (13)²- 4(6)(-57) = 1537
Vdelta = 39.20
deux solutions
x ' = (-b-Vdelta)/2a = (-13-39.2)/12 = -4.35
x" = (-b+Vdelta)/12 = 2.18
Bon courage ...