七年级整式的加减计算题100道

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人之蓄蕴,由学而大--1---1-整式的加减计算题4)214(2)2(3-yxyx-12)1(32nmm)(4)()(3222222yzzyyx1)]1([222xxx-)32(3)32(2abba)]32(3)(222xyxxyx222213344abababab323712ppppp2237(43)2xxxx-22225(3)2(7)abababab222226284526xyxyxyxxyyxxy3(2)(3)3abaabab22112()822aabaabab)24()215(2222abbaabba-4)142()346(22mmmm)5(3)8(2222xyyxyxxy人之蓄蕴,由学而大--2---2-(2)()xyyyyx2237(43)2xxxx)(2)(2babaa)32(2[)3(1yzxxxy])32(3)23(4)(5bababa)377()5(322222ababbabaa)45()54(3223xxxx)324(2)132(422xxxx)69()3(522xxx)35()2143(3232aaaaaa)(4)(2)(2nmnmnm]2)34(7[522xxxx(2)(3)xyyxbababa422752322222223abbaabba2213[5(3)2]42aaaa人之蓄蕴,由学而大--3---3-xyyxxyyxyx22222322baabbaababba222222]23)35(54[3),23()2(342222caacbacaacba)32(65ababa)5(22(-a3+2a2)-(4a2-3a+1)(4a2-3a+1)-3(1-a3+2a2)3(a2-4a+3)-5(5a2-a+2)3x2-[5x-2(14x-32)+2x2]7a+(a2-2a)-5(a-2a2)-3(2a+3b)-31(6a-12b)(a3-2a2+1)-2(3a2-2a+21)7xy+xy3+4+6x-25xy3-5xy-3x-2(1-2x+x2)+3(-2+3x-x2)-2(3a2-4)+(a2-3a)-(2a2-5a+5)人之蓄蕴,由学而大--4---4--12a2b-5ac-(-3a2c-a2b)+(3ac-4a2c)-2(4a-3b)+3(5b-3a)21x-3(2x-32y2)+(-23x+y2)5a-[6c-2a-(b-c)]-[9a-(7b+c)]52a-[2a+(32a-2a)-2(52a-2a)]-5xy2-4[3xy2-(4xy2-2x2y)]+2x2y-xy7-3x-4x2+4x-8x2-152(2a2-9b)-3(-4a2+b)8x2-[-3x-(2x2-7x-5)+3]+4-32ab+43a2b+ab+(-43a2b)-1(8xy-x2+y2)+(-y2+x2-8xy)(2x2-21+3x)-4(x-x2+21)2x-(3x-2y+3)-(5y-2)-(3a+2b)+(4a-3b+1)-(2a-b-3)人之蓄蕴,由学而大--5---5-3x-[5x+(3x-2)]1-3(2ab+a)十[1-2(2a-3ab)]3x2-[7x-(4x-3)-2x2]2(-3x2-xy)-3(-2x2+3xy)-4[x2-(2x2-xy+y2)]化简再求值:)522(2)624(22aaaa其中1a.化简再求值:)3123()21(22122babaa其中32,2ba.化简再求值:22463421xyxyxyxy,其中12,2xy(5x-3y-2xy)-(6x+5y-2xy),其中5x,1y若0322ba,求3a2b-[2ab2-2(ab-1.5a2b)+ab]+3ab2的值;人之蓄蕴,由学而大--6---6-233(4333)(4),2;aaaaaa其中22222222(22)[(33)(33)],1,2.xyxyxyxyxyxyxy其中2222223224babaabbababa其中4.0,41ba3-2xy+2yx2+6xy-4x2y,其中x=-1,y=-2.(-x2+5+4x3)+(-x3+5x-4),其中x=-2;(3a2b-ab2)-(ab2+3a2b),其中a=2,b=3人之蓄蕴,由学而大--7---7-yxxyx32332,其中51,1yx化简、求值21x-2(x-31y2)+(-23x+31y2),其中x=-2,y=-32.xxxxxx5)64(213223312323其中x=-121;21x2-2222231322331yxyx,其中x=-2,y=-342(a2b+2b3-ab3)+3a3-(2ba2-3ab2+3a3)-4b3,其中a=-3,b=221x2-2212-(x+y)2-23(-32x2+31y2),其中x=-2,y=-34人之蓄蕴,由学而大--8---8-求5x2y-2x2y与-2xy2+4x2y的和.求3x2+x-5与4-x+7x2的差.已知2a+(b+1)2=0,求5ab2-[2a2b-(4ab2-2a2b)]的值.已知222244,5AxxyyBxxyy,求3A-B已知A=x2+xy+y2,B=-3xy-x2,求2A-3B.有两个多项式:A=2a2-4a+1,B=2(a2-2a)+3,当a取任意有理数时,请比较A与B的大小.人之蓄蕴,由学而大--9---9-21x-2(x-31y2)+(-23x+31y2),其中x=-2,y=-32.2(a2b+2b3-ab3)+3a3-(2ba2-3ab2+3a3)-4b3,其中a=-3,b=2已知A=4x2-4xy+y2,B=x2-xy-5y2,求3A-B已知A=x2+xy+y2,B=-3xy-x2,求2A-3B.已知1232aaA,2352aaB,求BA32已知325Axx,2116Bxx,求:⑴A+2B;⑵当1x时,求A+5B的值。

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