1.化简下列各式:
(1)(ab)b(2ab) (2)(
2a28a2 )a22a4a2a
2.化简下列各式:
(1)(2a1)(12a)(a2)(a3)(a1) (2)(2)
2x1x5x11() 22x9x3x9x13.化简:
x28x16121x2 (1)(xy)(3xy)(x2y)+5y (2) x22xx2x422
4.计算:
2x1x24x4x1)(1) 2(ab)(a2b)(2ab) (2) ( x1x12
3x24x44.(1)(2x-y)(2x+y)-(x-2y) (2)x1 x1x12
5.化简:
(1)(x2y)(x2y)(x2y);
2 (2)
x21(1) 2x93x3x
1
9.(1)2(ab)2(ab)(a2b)
10.计算题:(1)(2x+y)2
-(2x-y)(2x+y)-2xy
11.计算:
1)3a(a1)(3a)(3a)(2a1)2
(2)(4xx2x2x)4x24x4 (2)a2a22a8a24a2a (2)(x22x4x2x1x2)4x41x
2
(
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