1、(a-b+4ab/a-b)(a+b-4ab/a+b)
={[(a-b)²+4ab]/(a-b)}*{[(a+b)²-4ab]/(a+b)}
={(a+b)²/(a-b)}*{(a-b)²/(a+b)}
=(a+b)*(a-b)
=a²-b²
2、(3x的三次方y的二次方z的负一次方)负二次方*(5xy的负二次方z的三次方)二次方
=[1/(3x³y²/z)²]*(5xz³/y²)²
=[25z²/(3x³y²)²]*(xz³/y²)²
=[(25/9)*z^8 /(x^4*y^8)
1、(a-b+4ab/a-b)(a+b-4ab/a+b)
={[(a-b)²+4ab]/(a-b)}*{[(a+b)²-4ab]/(a+b)}
={(a+b)²/(a-b)}*{(a-b)²/(a+b)}
=(a+b)*(a-b)
=a²-b²
2、(3x的三次方y的二次方z的负一次方)负二次方*(5xy的负二次方z的三次方)二次方
=[1/(3x³y²/z)²]*(5xz³/y²)²
=[25z²/(3x³y²)²]*(xz³/y²)²
=[(25/9)*z^8 /(x^4*y^8)