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

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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

(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