已知x+3y=2010,求(x²+2xy—-3y²)÷(x-y)的值.
问题描述:
已知x+3y=2010,求(x²+2xy—-3y²)÷(x-y)的值.
答
化简得(x+3y)*(x-y)/(x-y)=x+3y=2010
已知x+3y=2010,求(x²+2xy—-3y²)÷(x-y)的值.
化简得(x+3y)*(x-y)/(x-y)=x+3y=2010