计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]²

计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]²
计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]²

计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]²
[12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]²
=【12×12×12÷(4×4)(x+y)^9 (y-x)^3】 ÷【(x+y)^4 (x-y)^2】
=【12×12×12÷(4×4)(x+y)^9 (y-x)^3】 ÷【(x+y)^4 (y-x)^2】
=108(x+y)^5 (y-x)

dsfdsfsdgfdsgf

Sjs=(Pjs2+Qjs2)1/2=(65.222+79.672)1/2