作业帮-2a三次方+12a²-18a=?[(x+y)²-（x-y）²]÷（2xy)=？[5xy²（x²-3xy)+(3x²y²)三次方]÷（5xy)²=？
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/18 01:47:53
![-2a三次方+12a²-18a=?[(x+y)²-（x-y）²]÷（2xy)=？[5xy²（x²-3xy)+(3x²y²)三次方]÷（5xy)²=？](/uploads/image/z/1668749-5-9.jpg?t=-2a%E4%B8%89%E6%AC%A1%E6%96%B9%2B12a%26%23178%3B-18a%3D%3F%5B%28x%2By%29%26%23178%3B-%EF%BC%88x-y%EF%BC%89%26%23178%3B%5D%C3%B7%EF%BC%882xy%29%3D%EF%BC%9F%5B5xy%26%23178%3B%EF%BC%88x%26%23178%3B-3xy%29%2B%283x%26%23178%3By%26%23178%3B%29%E4%B8%89%E6%AC%A1%E6%96%B9%5D%C3%B7%EF%BC%885xy%29%26%23178%3B%3D%EF%BC%9F)
xQAj0PV!r@l!!rϽ
\%!=I3;~}nχ,\,]
" ~ V@ eḨe'-u`cNT/HQsc˲)jj'V ZH6BA0
!~q&gwQ[> y ~N~6CjȈ=,,ɠF
48*ڵfov!
-2a三次方+12a²-18a=?[(x+y)²-（x-y）²]÷（2xy)=？[5xy²（x²-3xy)+(3x²y²)三次方]÷（5xy)²=？
-2a三次方+12a²-18a=?
[(x+y)²-（x-y）²]÷（2xy)=？[5xy²（x²-3xy)+(3x²y²)三次方]÷（5xy)²=？
-2a三次方+12a²-18a=?[(x+y)²-（x-y）²]÷（2xy)=？[5xy²（x²-3xy)+(3x²y²)三次方]÷（5xy)²=？
[(x+y)²-（x-y）²]÷（2xy)=[(x²+2xy+y²)-(x² -2xy+y² )]÷(2xy)=(4xy)÷(2xy)=2
[5xy²（x²-3xy)+(3x²y²)^3]÷（5xy)²=[5x^3y^2-15x^2y^3+27x^6y^6]/(25x^2y^2)
=(x^2y^2)[5x-15y+27x^4y^4]/(25x^2y^2)=(1/5)x-(3/5)y+(27/25)x^4y^4