1、3x(x3)(x4) (2xy1)280.479.6 50052(6a)2b28a2b (x3y37x2y4z4)2xy(x3)2(4x2)(2x4) (yz)2(2yz)(3yz)二、因式分解。100x2y2 (qb)(x2y)(qb)(x4y)a212an36n2 924(an)16(an)2d349d x41680a210a4b 18a2b3c70b8q(1b)4q(1b) 8(1b)m(1b)4100b2 2x28y20.16m24 (6xy)2(8x7y)22540b16b2 (ab)24m(ab)4m2100x260x9 16a28a(mn)(mn)2x210x21 x27x305
2、x249x72 94a2(3xy2)2(xy)3 (ab)(a2b)3x(x1)(x4) (3x5y1)240.239.8 7042(4a)2b410a2b2 (4x2y32x4y4z2)5xy22(x2)2(3x4)(3x1) (yz)2(2yz)(2yz)x2y2 (pa)(x3y)(pa)(x4y)a26an9n2 2530(bn)9(bn)2b316b 81x41625a70a2b 12ab3c10b18q(6b)28p(6b) 8(6b)m(6b)916y2 27x23y225m2361 (xy)2(xy)21664n64n2 (xy)210m(xy)25m24m236m81 36a
3、212a(mn)(mn)2x28x12 x28x209x230x16 2525n2(3x2y)3(x2y3)3 (4a5b)(5a3b)2x(x2)(x3) (6x4y2)26.35.7 69952(3a)3b218a2b2 (3x3y2x3y3z2)4xy2(x2)2(4x5)(3x2) (yz)2(4yz)(4yz)81x249y2 (mb)(6xy)(mb)(3xy)a214ay49y2 3672(bm)36(bm)2d381d 16x425645a10a 18a4b2c40b4p(x5)36p(x5) 4(x5)m(x5)116m2 4x216y29b2324 (7xy)2(6x7y)
4、264112m49m2 (ab)210m(ab)25m281m254m9 25a210a(xy)(xy)2x216x64 x22x358x238x42 10049a2(2x2y3)2(xy3)3 (2ab)(a6b)3x(x4)(x4) (4xy1)239.8 10032(5a)3b48ab (4x4y4x2y3z2)6x2y2(x2)2(2x1)(3x4) (yz)2(2yz)(2yz)25x264y2 (ma)(4x2y)(ma)(x6y)a28ab16b2 1616(ap)4(ap)2a336a x41100a10a3 4abc50b3c16q(x1)16p(x1) 4(x1)m(x1)
5、1664a2 16x264y20.16y2196 (9xy)2(xy)23636b9b2 (xy)24m(xy)4m216y248y36 16a28a(mn)(mn)2x213x42 x24x218x236x40 254x2(3x2y)2(x2y)3 (6ab)(a5b)2x(x1)(x4) (3x2y4)29.18.9 90032(2a)2b32a2b2 (5x4y39x3y4z4)x2y2(x1)2(3x4)(2x4) 4(yz)2(4yz)(4yz)49x2y2 (an)(3x4y)(an)(xy)a220am100m2 918(an)9(an)2d325d x41640a210ab 1
6、6ab3c70b4q(x8)8q(x8) 6(x8)m(x8)136m2 2x250y20.09b249 (x2y)2(8x8y)2114n49n2 (xy)210m(xy)25m264x2128x64 4a24a(xy)(xy)2x210x21 x28x202x221x54 6464x2(3xy)3(xy)3 (a3b)(5ab)3x(x5)(x5) (2x6y1)22.11.9 89972(5a)2b32ab2 (2x2y32x3y4z4)2xy23(x3)2(3x2)(4x4) (yz)2(4yz)(3yz)64x2100y2 (pc)(x3y)(pc)(x5y)a28ay16y2 36
7、48(dm)16(dm)2b316b x4165a60ab 10abc40b18q(8b)36p(8b) 4(8b)m(8b)949m2 16x24y20.16n2256 (4x6y)2(x10y)21672y81y2 (xy)26m(xy)9m225y240y16 9a26a(ab)(ab)2x217x72 x22x353x228x60 4981y2(2xy3)2(xy3)3 (a4b)(5ab)2x(x3)(x4) (xy3)239.8 49992(3a)3b218a2b (4x2y4x3y3z4)9xy(x3)2(3x4)(2x4) 4(yz)2(3yz)(2yz)x236y2 (mb)
8、(2xy)(mb)(6x5y)a210ax25x2 1632(an)16(an)2a364a 16x4256100a260ab 12ab3c30b318q(y3)4p(y3) 8(y3)m(y3)364n2 18x250y236a2144 (9x2y)2(xy)21632x16x2 (ab)28m(ab)16m249b284b36 36a212a(mn)(mn)2x217x72 x27x309x233x10 3636y2(3xy3)2(xy)3 (ab)(a6b)3x(x2)(x4) (x6y4)27.26.8 19992(9a)3b320a2b2 (9x2y46x2y4z2)9x2y(x2)2(3x1)(4x1) 3(yz)2(3yz)(2yz)x2y2 (dq)(xy)(dq)(6xy)a26ax9x2 924(dp)16(dp)2d325d 16x4155a60ab 14abc40b4c18p(x6)32p(x6)
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