Développe et redui 1) (2x-1)²-(1+x)(3x+2) 2) (6x-3/2)(6/5x+4

1) (2x-1)²-(1+x)(3x+2)=4x²-4x+1-(3x+2+3x²+2x)
(2x-1)²-(1+x)(3x+2)=4x²-3x²-4x-3x-2x+1-2=x²-9x-1

2)
(6x-3/2)(6/5*x+4)=36/5*x²+24x-18/10*x-6=36/5*x²+222/10*x-6=36/5*x²+111/5-6