因式分解：[(b-5a)^2-4(5a-b)]/(5a-b-4)还有[x(x^2y^2-xy)-y(x^2-x^3y)]/(3x^_数学解答

因式分解：[(b-5a)^2-4(5a-b)]/(5a-b-4)
还有[x(x^2y^2-xy)-y(x^2-x^3y)]/(3x^2y)

人气：100 ℃　时间：2020-03-24 09:44:17

解答

[(b-5a)^2-4(5a-b)]/(5a-b-4)
=[(5a-b)^2-4(5a-b)]/(5a-b-4)
=(5a-b)(5a-b-4)/(5a-b-4)
=5a-b