a²+b²=(a+b)²-2ab=(a-b)²+2ab
(a+b)²=(a-b)²+4ab (a-b)²=(a+b)²-4ab
用除法分配律拆开=a的2n+1次/(-1/3*a的2n-1次)+1/2*a的2n次/ (1/3*a的2n-1次)-1
=-3a²+3a/3-1
a²+b²=(a+b)²-2ab=(a-b)²+2ab
(a+b)²=(a-b)²+4ab (a-b)²=(a+b)²-4ab
用除法分配律拆开=a的2n+1次/(-1/3*a的2n-1次)+1/2*a的2n次/ (1/3*a的2n-1次)-1
=-3a²+3a/3-1