数学之美团为你解答(2x+6)/(x-3) ÷ (x²+6x+9)/(9- x²) × (x+2)/(x-2)= 2(x+3)/(x-3) × (3+x)(3-x) /(x+3)² × (x+2)/(x-2)= - 2(x+2) / (x-2)= - 2 ( -3/2 +2) / ( - 3/2 - 2)= 2/7