5xy²-{2x²y-[3xy²-(xy²-2x²y)]÷(-1/2xy)
问题描述:
5xy²-{2x²y-[3xy²-(xy²-2x²y)]÷(-1/2xy)
最后那个是“负二分之一xy”. 求化简值.
要完整的过程。
答
=5xy^2-{2x^2y-[3xy^2-xy^2+2x^2y]/(-xy/2)
=5xy^2+{2x^2y-2xy^2-2x^2y}/(xy/2)
=5xy^2-2xy^2/(xy/2)
=5xy^2-4y