(1)2(a²b+2b³-ab²)+3a³-(2a²b-3ab
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/21 13:08:34
(1)2(a²b+2b³-ab²)+3a³-(2a²b-3ab²+3a³)-4b³
(2)(4x-3y)-[2(x-1)+2y-3]
(3)(2a-5b)-{-3b-2[4a-2(3a-b)]}
(2)(4x-3y)-[2(x-1)+2y-3]
(3)(2a-5b)-{-3b-2[4a-2(3a-b)]}
(1)2(a²b+2b³-ab²)+3a³-(2a²b-3ab²+3a³)-4b³
=2a²b+4b³-2ab²+3a³-2a²b-3ab²+3a³-4b³
=0
(2)(4x-3y)-[2(x-1)+2y-3]
=4x-3y-[2x-3+2y-3]
=4x-3y-2x+2-2y+3
=2x-5y+5
(3)(2a-5b)-{-3b-2[4a-2(3a-b)]}
=2a-5b-{-3b-2[4a-6a+2b]}
=2a-5b-{-3b-8a+12a-4b}
=2a-5b+3b+8a-12a+4b
=2b-2a
有问题随时问吧,在我睡着之前.
=2a²b+4b³-2ab²+3a³-2a²b-3ab²+3a³-4b³
=0
(2)(4x-3y)-[2(x-1)+2y-3]
=4x-3y-[2x-3+2y-3]
=4x-3y-2x+2-2y+3
=2x-5y+5
(3)(2a-5b)-{-3b-2[4a-2(3a-b)]}
=2a-5b-{-3b-2[4a-6a+2b]}
=2a-5b-{-3b-8a+12a-4b}
=2a-5b+3b+8a-12a+4b
=2b-2a
有问题随时问吧,在我睡着之前.
a³+a²b-(4a²b+3ab²)+b³+6ab²+2b&
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
因式分解:1、-4ab-4a²-b² 2、3ab²+6a²b+3a³
分解因式 -a³+a²b-(1/4)ab² -2a(a+b)+b(a+b)
因式分解:2a³b-3a²b+3b³-2ab³
因式:2a³b-3a²b+3b³-2ab³
已知A=5a²b+2a四次方-3a²b-ab³,B=6ab³-8a³b
2a²b(-1/2a²b³+5ab²)-3a²b(-2/3ab)5ab
若a²+b²=3ab,则[1+2b³/(a³-b³)]/[1+2b/(
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
3a²b+ab²-2a²b²-3ab²-3a²b+4ab
(-a³)*(-2ab)³-3a²b(a^4*b²+二分之一a*b³-