提问（a^2-1)(a^2+1)(a-1)-(a^2-1)^2
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提问（a^2-1)(a^2+1)(a-1)-(a^2-1)^2提问（a^2-1)(a^2+1)(a-1)-(a^2-1)^2提问（a^2-1)(a^2+1)(a-1)-(a^2-1)^2(a^2-1)
提问（a^2-1)(a^2+1)(a-1)-(a^2-1)^2
提问（a^2-1)(a^2+1)(a-1)-(a^2-1)^2
提问（a^2-1)(a^2+1)(a-1)-(a^2-1)^2
(a^2-1)(a^2+1)(a-1）-（a^2-1)^2
=(a^2-1)[(a^2+1)(a-1）-(a^2-1)]
=(a^2-1)(a^3-a^2+a-1-a^2+1)
=(a+1)(a-1)(a^3-2a^2+a)
=a(a+1)(a-1)(a^2-2a+1)
=a(a+1)(a-1)^3
a(a-1)^3(a+1)
(a^2-1)(a^2+1)(a-1）-（a^2-1)^2
=(a^2-1)[(a^2+1)(a-1）-(a^2-1)]
=(a^2-1)[(a^2+1)(a-1）-(a-1)(a+1)]
=(a+1)(a-1)(a-1)[(a^2+1)-(a+1)]
=(a+1)(a-1)(a-1)[a^2-a]
=a(a+1)(a-1)(a-1)(a-1)
=a(a+1)(a-1)^3
（a^2-1)(a^2+1)(a-1)-(a^2-1)^2
=(a+1)(a-1)(a^2+1)(a-1)-(a+1)^2(a-1)^2
=(a+1)(a-1)^2[(a^2+1)-(a+1)]
= (a+1)(a-1)^2(a^2-a)
=a(a+1)(a-1)^3
提问（a^2-1)(a^2+1)(a-1)-(a^2-1)^2
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提问A={y/y^2-(a^2+a+1)y+a(a^2+1)>0} B={Y/Y^2-6y+8
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
1、Is that a grey pencil?(作否定回答 ) 2、This is （a tiger).(对括号部分提问)3、That's (a black cat).( 对括号部分提问 ) 4、It's( brown and yellow).(对括号部分提问)
1、Is that a grey pencil?(作否定回答 ) 2、This is （a tiger).(对括号部分提问)3、That's (a black cat).( 对括号部分提问 ) 4、It's( brown and yellow).(对括号部分提问)
a-1/a+2
1-a/-2-a
-2×a×1/a
计算：[a-(1/a)]/a^2-2a+1/a
a(a-1)(a-2)(a-3)(a-4)因式分解
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a－a a=[ ] [4]a－a=a＋a a=[ ]
(通分） a/a^a^a+3a+2 ,a/a^a+2a+1 ,-1/3a+6