分式的乘除计算补充练习1. a2−4a2−4 a+4⋅a−3a2+3 a+2 2. 2 x−64−4 x+x2 ÷( x+3)⋅x2+x−63−x3. 3a−3b10ab⋅50 a2b2a2−b2 4. x2−5 x+6x2−1⋅x2+ xx−35. ( xy−x2)÷ x−yxy 6. x2−4 y2x2+2xy+ y2÷ x+2 yx2+ xy7. x2−1x2+4 x+4÷( x+1)⋅x2+3x+2x−1 8. 4 a4 b215n3 ÷−8a2b235n29. 8a2b4⋅−3a4 b3 10. ( xy−x2)÷ x2−2 xy+ y2xy⋅x−yx211. a2−4 b23ab2 ⋅ aba−2b 12. x2−y2x⋅ −x2( x+ y )213. x2−y2x+ y ÷ x2+xy2 x+2 y 14. ( x2− y2)÷xy−y2x+ y15. x2+2 x+4x2+4 x+4÷2x2−83x+6 ÷1x2−4 16. x2−6 x+8x2−5 x+6⋅x2−2x−3x2−3 x−417. 2x+4x2−4 x+4÷ x+22 x−4⋅( x2−4) 18. x2+6 x+9x2−1⋅x2+2x−3x2−919. x2−x−2x2−4 x+3⋅x2−9x2−5x+6 20. x2−6 x−7x2−x−6÷x2−49x2−3 x−10⋅ x+72( x−5)
