(X-9y)/(6xy^2-(x+3y)/(9x^2y)
问题描述:
(X-9y)/(6xy^2-(x+3y)/(9x^2y)
答
3x(x-9y)/18x²y²-2y(x+3y)/18x²y²
=(3x²-27xy-2xy-6y²)/18x²y²
=(3x²-29xy-6y²)/18x²y²