Resoudre dans l'ensemble des nombres réels les équations suivantes a) (2x-3)(-x-2)=(x+1)(2x-3)
b) (-2x+1)(x+4)+2(2x-1)(x+1)=0
c) x²+2x+1=4x²-12+9
d) (3x-2)²=16x²
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