(3y-6)(-y)(-3x)(4x²;-4/3x+1)(-xy)(2x-5y-1)5x(2x+3)+x(x+1)2z(a²;+3a-2)-2(a³;+2a&sup 書上的題………… (3y-6)(-y)(-3x)(4x²;-4/3x+1)(-xy)(2x-5y-1)5x(2x+3)+x(x-1)2a(a²;+3a-2)-2(a³;+2a²;-a+1)

(3y-6)(-y)(-3x)(4x²;-4/3x+1)(-xy)(2x-5y-1)5x(2x+3)+x(x+1)2z(a²;+3a-2)-2(a³;+2a&sup 書上的題………… (3y-6)(-y)(-3x)(4x²;-4/3x+1)(-xy)(2x-5y-1)5x(2x+3)+x(x-1)2a(a²;+3a-2)-2(a³;+2a²;-a+1)

(1)(3y-6)(-y)=-3y²;+6y(2)(-3x)(4x²;-4/3x+1)=-12x²;+4x-3x(3)(-xy)(2x-5y-1)=-2x²;y+5xy²;+xy(4)5x(2x+3)+x(x-1)=10x²;+15x+x²;-x=11x²;+14x(5)2a(a²;+…