帮我出几道代数式求值的题!例:(3x-4y+2xy)-(2x-5y+5xy),其中x=-2,y=1.急用!能出几道就出几道!
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![帮我出几道代数式求值的题!例:(3x-4y+2xy)-(2x-5y+5xy),其中x=-2,y=1.急用!能出几道就出几道!](/uploads/image/z/5919864-24-4.jpg?t=%E5%B8%AE%E6%88%91%E5%87%BA%E5%87%A0%E9%81%93%E4%BB%A3%E6%95%B0%E5%BC%8F%E6%B1%82%E5%80%BC%E7%9A%84%E9%A2%98%21%E4%BE%8B%EF%BC%9A%283x-4y%2B2xy%29-%282x-5y%2B5xy%29%2C%E5%85%B6%E4%B8%ADx%3D-2%2Cy%3D1.%E6%80%A5%E7%94%A8%21%E8%83%BD%E5%87%BA%E5%87%A0%E9%81%93%E5%B0%B1%E5%87%BA%E5%87%A0%E9%81%93%21)
帮我出几道代数式求值的题!例:(3x-4y+2xy)-(2x-5y+5xy),其中x=-2,y=1.急用!能出几道就出几道!
帮我出几道代数式求值的题!例:(3x-4y+2xy)-(2x-5y+5xy),其中x=-2,y=1.急用!
能出几道就出几道!
帮我出几道代数式求值的题!例:(3x-4y+2xy)-(2x-5y+5xy),其中x=-2,y=1.急用!能出几道就出几道!
(10x+3)×(3y+6-x),x=3,y=1
3X+Y-(0×900X),x=5,y=3
2.5 × x × y,x=10,y=0.01
(123×2/X) + Y,x=2,y=10
1.2×(X+9)-6Y,X=1,Y=12
(78/2)*Y-5X,x=5,y=10
5xy+3X-4Y×30,X=20,Y=0.2
(3.3×X)/Y +30,X=30,Y=3
-8x2-5x(-x+3y)+(3x+2y)(x-y),其中x=2,y=-1
3ab-4ab+8ab-7ab+ab=______.a=3,b=5
7x-(5x-5y)-y=______.x=10,y=3
24a*3b-8ab=______.a=30b=0
11.(2x-3xy+4y)+(x+2xy-3y)=______.x=2,y=2
12.2a-(3a-2b+2)+(3a-4b-1)=______.a=3,b=5
13.-16x+15y-2xy=______.x=2,y=0.1
14.2x-(x+3y)-(-x-y)-(x-y)=______.x=3,y=5
16.2x+2y-[3x-2(x-y)]=______.x=0.1y=2
17.5-(1-x)-(xy-1)=______.x=3,y=11
18.( x+y)+(4xy+7x2-y2)=.x=4,y=3
19.x-2xy+4xy+y.x=12,y=3
<123+321-12jiy>+<1236-125+23gtif>=12459gigbjf