计算题：x^2+4x+4分之x^2-1除以(x+1)*x-1分之x^2+3x+2 9点之前要._数学解答

计算题：x^2+4x+4分之x^2-1除以(x+1)*x-1分之x^2+3x+2 9点之前要.

人气：144 ℃　时间：2019-10-20 00:13:45

解答

原式=(x+1)(x-1)/(x+2)²*1/(x+1)*(x+1)(x+2)/(x-1)
=(x-1)/(x+2)²*(x+1)(x+2)/(x-1)
=(x+1)/(x+2)