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1、實(shí)用標(biāo)準(zhǔn)文案(1)(2x2-3xy+4y2)-2(x2+2xy-3y2);(2)2x+2y-[3x-2(x-y)];(3)-2(3x+z)-(-6x-4z)+2(-5y+3z);(4)3a-(2a-4b-6c)+3(-2c+2b);(5)9a2-[7a2-2a-(-a2+3a+5)];(6);(7)(x2-2y2-z2)-3(-y2+3x2-z2)+(5x2+2z2)(8)2(2xy+y2-3)+(-x2+y2)-(x2+2xy+2-y2)(9)2(a2-ab-b2)-3(4a-2b)+2(7a2-4ab+b2
2、)(10)4x-2(x-3)-3[x-3(4-2x)+8];(11)-(7x-y-2z)-{[4x-(x-y-z)-3x+z]-x};(12)2x2-{-3x-[4x2-(3x2-x)+(x-x2)]};精彩文檔實(shí)用標(biāo)準(zhǔn)文案(1)3x-2(2x-4y-6x)+3(-2z+2y);(2)(3a2-4ab-5b2)-2(2b2-5a2-3)-(-6ab+2)(3)(5a2b+3a2b2-ab2)-5(-2ab2+3a2b2+a2b)(4)-{2a2b-[3abc-(4ab2-a2b)]}(5)9a2+[7a2-2a
3、-(-a2+3a)](6)3a-(2a-3b)+3(a-2b)-b(7)(-y+6+3y4-y3)-3(2y2-3y3+y4-7)(8)-(2x2-y2)-3[2y2-(x2+2xy)](9)2x-(x+3y)-5(-x-y)-2(x-y)(10)(13x-11y+10z)-[15x-(15z-10y)](11)3x2y-5xy2-2(2x3-7x2y+6)-(4x3-xy2+10)精彩文檔實(shí)用標(biāo)準(zhǔn)文案(1)(2)[a-(b-c)]-2[-b-(-c-a)](3)(4x2-8x+5)-3(x3+3x2-6x+2
4、)(4)(3a6-a4+2a5-4a3-1)-2(2-a+a3-a5-a4)(5)2(-3x3+2x2-5x+1)-3(5-6x-x2+x3)(6)2m-{-3n+[-4m-(3m-n)]}(7)4(x-y+z)-2(x+y-z)-3(-x-y-z)(8)a3-(a2-a)+2(a2-a+1)-3(1-a4+a3)(9)(10)(11)(5a2-2ab+3b2)-3[-2b2+(-ab-a2)]精彩文檔實(shí)用標(biāo)準(zhǔn)文案(1)-2[b-2(-5a+3c)]-(-3b+5c)(2)(2x2y+3xy2+2xy)-3[-
5、(3x2y+2x2)-3xy-4](3)4x2-[7x2-5x-3(1-2x+x2)](4)(x3-2x2+x-4)-3(2x3-5x+3)(5)(3m4-m3-2m+5)-(-2m4-3m3-2m2-1)(6)(7)3+(2x-y)-(y-x);(8)x+2(3-x)-3(4x-1);(9)a-2(a+b)+3(a-4b);(10)2x-(5a-7x-2a);(11)2(x-3)-(-x+4);精彩文檔實(shí)用標(biāo)準(zhǔn)文案(1);(2)4x2-[6x-(2x-3)+2x2];(3)-5a2-a2-(-7a2)+(-3
6、a2);(4)6a2b+5ab2-4ab2-7a2b;(5)-3x2y+2x2y+3xy2-2xy2;(6);(7)-2(a2-3a)+(5a2-2a);(8)2x-(x+3y)-(-x-y)-(x-y);(9)(2x4―5x2―4x+1)―(3x3―5x2―3x);(10);(11)(3x2-xy-2y2)—2(x2+xy—2y2);精彩文檔實(shí)用標(biāo)準(zhǔn)文案(1);(2)(8xy-x2+y2)+(-y2+x2-8xy);(3)-ab+a2b+ab+(-a2b)-1;(4)3-2xy+2yx2+6xy-4x2y;(
7、5)(2x2-+3x)-4(x-x2+);(6)x-2(x-y2)+(-x+y2);(7);(8)(x2-xy+y)-3(x2+xy-2y);(9)5(a2b-3ab2)-2(a2b-7ab);(10)3a2-9a+5-(-7a2+10a-5);(11)(5x2y-7xy2)-(xy2-3x2y);精彩文檔實(shí)用標(biāo)準(zhǔn)文案(1)3a2-9a+5-(-7a2+10a-5);(2)-3a2b-(2ab2-a2b)-(2a2b+4ab2);(3)-2(ab-3a2)-[2b2-(5ab+a2)+2ab];(4)(a2+4
8、ab-4b2)-3(a2+b2)-7(b2-ab);(5)-3(2x2-xy)+4(x2+xy-6);(6)-3x2y+2x2y+3xy2-2xy2;(7)-[2m-3(m-n+1)-2]-1;(8)x2y-3xy2+2yx2-y2x;(9)(2x3-xyz)-2(x3-y3+xyz)+(xyz-2y3);(10)5x2-[3x-2(2x-3)+7x2];(11)2(x2y+xyz)-