推 angel07 : A+B=-3; AB=3; ans=AB(0+3)(0+3)=27; 10/15 21:45
→ angel07 : 寫錯orz 10/15 21:46
推 angel07 : A+B=-3; AB=1; 10/15 21:49
→ angel07 : ans=AB(-3A+3)(-3B+3)=9(AB-A-B+1)=45; 10/15 21:50
推 LPH66 : AB(-3A+2)(-3B+2) 才對吧? 10/15 22:23
→ LPH66 : 這樣得 AB(9AB-6(A+B)+4) = 1(9-6(-3)+4) = 31 10/15 22:23
推 angel07 : 樓上是對的 10/15 23:23