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已知A=x3-2x2+x-4,B=2x3-5x+3,計(jì)算A+B=______.

初一下冊(cè)合并同類(lèi)項(xiàng)化簡(jiǎn)求值解方程

化簡(jiǎn)求值:3ab-4ab 8ab-7ab ab=______. 7x-(5x-5y)-y=______. 23a3bc2-15ab2c 8abc-24a3bc2-8abc=______. -7x2 6x 13x2-4x-5x2=______. .2y (-2y 5)-(3y 2)=______. .(2x2-3xy 4y2) (x2 2xy-3y2)=______. 2a-(3a-2b 2) (3a-4b-1)=______. -6x2-7x2 15x2-2x2=______. 2x-(x 3y)-(-x-y)-(x-y)=______. 2x 2y-[3x-2(x-y)]=______. 5

初一計(jì)算簡(jiǎn)化求值題20道加答案

3.3ab-4ab+8ab-7ab+ab=______. 4.7x-(5x-5y)-y=______. 5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______. 6.-7x2+6x+13x2-4x-5x2=______. 7.2y+(-2y+5)-(3y+2)=______. 11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______. 12.2a-(3a-2b+2)+(3a-4b-1)=______. 13.-6x2-7x2+15x2-2x2=______. 14.2x-(x+3y)-(-x-y)-(x-y)=______. 16.2x+2y-[3x

整式的加減計(jì)算題初一簡(jiǎn)單一點(diǎn)

21.已知A=x3-2x2 x-4,B=2x3-5x 3,計(jì)算A B=______. 22.已知A=x3-2x2 x-4,B=2x3-5x 3,計(jì)算A-B=______. 23.若a=-0.2,b=0.5,代數(shù)式-(|a2b|-|ab2|)的值為_(kāi)_____. 25.一個(gè)多項(xiàng)式減去3m4-m3-2m 5得-2m4-3m3-2m2-1,那么這個(gè)多項(xiàng)式等于______. 26.-(2x2-y2)-[2y2-(x2 2xy)]=______. 27.若-3a3b2與5ax-1by 2是同類(lèi)項(xiàng),則x=______,y=______. 28.(-y 6 3y4-y3)-(2y2-3y3 y4-7)=__

50道化簡(jiǎn)求值計(jì)算題

3.3ab-4ab+8ab-7ab+ab=______. 4.7x-(5x-5y)-y=______. 5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______. 6.-7x2+6x+13x2-4x-5x2=______. 7.2y+(-2y+5)-(3y+2)=______. 11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______. 12.2a-(3a-2b+2)+(3a-4b-1)=______. 13.-6x2-7x2+15x2-2x2=______. 14.2x-(x+3y)-(-x-y)-(x-y)=______. 16.2x+2y-[3x

整式的加減混合運(yùn)算

(2x-3y)+(5x+4y) (8a-7b)-(4a-5b) -(3x-2y + z)-[5x-(x-2y +z ) -3x] 2(7x2+5x-3)-3(5x2-3x+2) 2b3 +(3ab3-a2b)-2(ab2 + b3) (-6x2+5xy)-12xy-(2x2-9xy) (x2-2x3 +1)-(-1+2x3 + 2x2),其中x=2 3a-[-2b+(4a-3b)],其中a=-1,b=3 3ab-4ab+8ab-7ab+ab= 7x-(5x-5y)-y= 23a3bc2-15ab2c+8abc-24a3bc2-8abc= -7x2+6x+13x2-4x-5x2= 2y+(-2y
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