去括号,在合并同类项.1.8X+2Y+2(5X-2Y) 2.7M+3M+3(M+2N)4.2X²-2[3X-2(-X²+2X-1﹚-4]
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/09 09:30:47
去括号,在合并同类项.1.8X+2Y+2(5X-2Y)2.7M+3M+3(M+2N)4.2X²-2[3X-2(-X²+2X-1﹚-4]去括号,在合并同类项.1.8X+2Y+2(5X
去括号,在合并同类项.1.8X+2Y+2(5X-2Y) 2.7M+3M+3(M+2N)4.2X²-2[3X-2(-X²+2X-1﹚-4]
去括号,在合并同类项.1.8X+2Y+2(5X-2Y) 2.7M+3M+3(M+2N)
4.2X²-2[3X-2(-X²+2X-1﹚-4]
去括号,在合并同类项.1.8X+2Y+2(5X-2Y) 2.7M+3M+3(M+2N)4.2X²-2[3X-2(-X²+2X-1﹚-4]
1.8X+2Y+2(5X-2Y)
=8x+2y+10x-4y
=18x-2y
2.7M+3M+3(M+2N)
=10m+3m+6n
=13m+6n
4.2X²-2[3X-2(-X²+2X-1﹚-4]
=2x²-2(3x+2x²-4x+2-4)
=2x²-2(2x²-x-2)
=2x²-4x²+2x+4
=-2x²+2x+4
1.原式=8x+2y+10x-4y=18x-2y;2.原式=7m+3m+3m+6n=13m+6n;4.x^2表示x的平方;原式=2x^2-2(3x+2x^2-4x
+2-4)=2x^2-6x-6x^2+8x+2=-4x^2+2x+2
先去括号,在合并同类项 x+[x+(-2x-4y)]
3x-2y-[-4x+(x+3y)]+y 去括号然后合并同类项,
3x-(3x+4y)+(4x+2y)去括号,并合并同类项
(2xy-y)-(-y+xy)去括号并合并同类项
2(x+y)+(-5X+2y)去括号合并同类项
(2x-5y)-(2x+4y) 去括号,并合并同类项.
先去括号再合并同类项 -3(x-y)+2(3x-2y)
2(x十y)-3(x-2y)去括号合并同类项
去括号,合并同类项 -1/2(x+y)+1/4(2x-y) 求求了
5(2x-7y)-3(4x-10y) 去括号,再合并同类项,
-(-5x+y)-3(2x-3y)去括号再合并同类项求解如题啦
2(ab-3a)-3(2ab-5a) 先去括号,在合并同类项 2x-[5x-2(3x-y)]-5y先去括号,在合并同类项
x-〔-x+(2x-4y)〕.先去括号,然后合并同类项.
先去括号,再合并同类项.4x+(x-3y) -(2s-5)+6
初一数学题:去括号在合并同类项:-(x^2-2x)+(-3x+2x^2)
先去括号在合并同类项 x-(1-x)+(1-2x)
去括号在合并同类项
去括号在合并同类项