4-4x+x平方分之2x-6 乘以(x+3)分之1 乘以3-x分之(x+3)乘以(x-2)
问题描述:
4-4x+x平方分之2x-6 乘以(x+3)分之1 乘以3-x分之(x+3)乘以(x-2)
(2x-6/4-4x+x²)÷(x+3)乘以[(x+3)乘以(x-2)/3-x] 这样看得懂吗。其实刚才我自己看了一遍题目,发现我也晕了···
(2x-6/4-4x+x²)÷(x+3)*[(x+3)*(x-2)/3-x] 这样可以了吧
答
=(2x-6)/(4-4x+x²)*[1/(x+3)]*[(x+3)*(x-2)/(3-x)]
=2(x-3)/(x-2)²*[1/(x+3)]*[(x+3)*(x-2)/(3-x)]
=-2/(x-2)
=2/(2-x)