B=(6x-7) (3-2x)
B=18x-12x²-21+14x
B= -12x²+32x-21
Pour x=0
B=-12×0²+32×0-21
= -21
Pour x=1
B=-12×1²+32×1-21
= -12+32-21
= -1
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B=(6x-7) (3-2x)
B=18x-12x²-21+14x
B= -12x²+32x-21
Pour x=0
B=-12×0²+32×0-21
= -21
Pour x=1
B=-12×1²+32×1-21
= -12+32-21
= -1