试说明代数式(2y+3)(3y+2)-6y(y+3)+5(y+1)的值与y的取值无关
问题描述:
试说明代数式(2y+3)(3y+2)-6y(y+3)+5(y+1)的值与y的取值无关
答
(2y+3)(3y+2)-6y(y+3)+5(y+1)=(6y+13y+6)-(6y+18y)+(5y+5)=11,代数式(2y+3)(3y+2)-6y(y+3)+5(y+1)的值与y的取值无关