|2a|-|a+c|-|1-b|+|-a-b|怎么做?
(a-b+c)(a+b-c)怎么做求过程
(a+b)(a^2+b^2)(a-b)怎么做
因式分解:a⒉(b-c)+b⒉(c-a)+c⒉(a-b)怎么做?
|a-b|+|a+c|-|b-c|+|2c|怎么化简啊?
(5a+3b+2c)(5a-3b-2c)怎么做
1/3a-(1/2a+4b+6c)+3(-2c+2b)怎么做
b/(a+c)=1/2,a/(b+c)=1/5 怎么得出a/(a+b+c)=1/6,b/(a+b+c)=1/3?
c语言(a>b)?(b>c?b:(a>c?c:a)):((a>c)?a:((b>c)?c:b))怎么看,
a^3+b^3+c^3>=1/3(a^2+b^2+c^2)(a+b+c)怎么证明
(a+b+c)(c+d+e)这道题怎么做
1.计算:(1)(a-b)(a-c)分之2a-b-c + (b-c)(b-a)分之2b-c-a + (c-b)(c-a)
(2a+b)(2a-3b)-3a(2a+b)怎么做?