计算 4x^2/2x-3+9/3-2x 12/m^2-9-2/m-3 2x^2/3y^2乘以5y/6x除以10y/21x^2 a^_数学解答

计算 4x^2/2x-3+9/3-2x 12/m^2-9-2/m-3 2x^2/3y^2乘以5y/6x除以10y/21x^2 a^2-ab/a^2除以(a/b-b...
计算 4x^2/2x-3+9/3-2x 12/m^2-9-2/m-3 2x^2/3y^2乘以5y/6x除以10y/21x^2a^2-ab/a^2除以(a/b-b/a) 急阿! 求你高手阿要过程呢

人气：409 ℃　时间：2020-02-06 04:01:54

解答

4x^2/(2x-3)+9/(3-2x)=4x^2/(2x-3)-9/(2x-3)=(4x^2-9)/(2x-3)=(2x+3)(2x-3)/(2x-3)=2x+312/(m^2-9)-2/(m-3) =12/(m-3)(m+3)-2(m+3)/(m-3)(m+3)=[12-2(m+3)]/(m-3)(m+3)=(12-2m-6)/(m-3)(m+3)=(6-2m)/(m-3)(m...