(-b+3a)-(a-b) (2x-5y)-(3x-5y+1) 2(2-7x)-3(6x+5)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/11/07 21:32:52
(-b+3a)-(a-b) (2x-5y)-(3x-5y+1) 2(2-7x)-3(6x+5)
(-8x²+6x)-5(x²-5分之4x+5分之1) (3a²+2a-1)-2(a²-3a-5)
(-8x²+6x)-5(x²-5分之4x+5分之1) (3a²+2a-1)-2(a²-3a-5)
(-b+3a)-(a-b)
=-b+3a-a+b
=2a
(2x-5y)-(3x-5y+1)
=2x-5y-3x+5y-1
=(2x-3x)-5y+5y-1
=-x-1
2(2-7x)-3(6x+5)
=4-14x-18x-15
=4-15-14x-18x
=-11-32x
(-8x²+6x)-5(x²-5分之4x+5分之1)
=-8x²+6x-5x²+4x-1
=-8x²-5x²+6x+4x-1
=-13x²+10x-1
(3a²+2a-1)-2(a²-3a-5)
=3a²+2a-1-2a²+6a+10
=(3a²-2a²)+(2a+6a)+(10-1)
=a²+8a+9
=-b+3a-a+b
=2a
(2x-5y)-(3x-5y+1)
=2x-5y-3x+5y-1
=(2x-3x)-5y+5y-1
=-x-1
2(2-7x)-3(6x+5)
=4-14x-18x-15
=4-15-14x-18x
=-11-32x
(-8x²+6x)-5(x²-5分之4x+5分之1)
=-8x²+6x-5x²+4x-1
=-8x²-5x²+6x+4x-1
=-13x²+10x-1
(3a²+2a-1)-2(a²-3a-5)
=3a²+2a-1-2a²+6a+10
=(3a²-2a²)+(2a+6a)+(10-1)
=a²+8a+9
(-b+3a)-(a-b) (2x-5y)-(3x-5y+1) 2(2-7x)-3(6x+5)
5a+2b+(3a-2b) -3x-(x+1)+(4x+2) -2/1(x+y)+3/1(x-y)
计算:(1) (2x-3y)+(5x+4y) (2) (8a-7b)-(4a-5b)
1)已知4X=5y,求(X+y):y 2)已知(a-b):(a+b)=3:7,求a:b
[(x-2y)²+(3x-2y)(3x+2y)]÷(-5x) (a-2b+3)(-a-2b-3).
8x+2y+(5x-2y) X^2+(-3x^2-2y+1) 3a-(4b-2a+1)
3a(x+y)-2b(x+y)=(x+y)(?)
化简 2x-[3y-5x-(-2x-7y)]等于 ( ) A:-7x+10y B:5x+4y C:-x-4y D:9x-
若|3x+2y-4|与6(5x+7y-3)的平方互为相反数,则x y的值是 A X=1 Y=1 B x=2 y=-1 C
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
化简3x^2y+(2x-5x^2y)还有2x-(2-5x),a-(2a-3b)+(3a-4b),8x+2y+2(5x-2
求大手啊6xy[x^2(5x+3)-3x^2(-4y)] 还有 [(a+b)(a-b)-(a-b)^2]除以4b 还有[