(1)2(4x-0.5) (2)-3(1-6/1x) (3)-x+(2x-2)-(3x+5)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/23 19:06:44
(1)2(4x-0.5) (2)-3(1-6/1x) (3)-x+(2x-2)-(3x+5)
(4)3a²+a²-(2a²-2a)+(3a-a²) (5)(5a+4c+7b)+(5c-3b-6a)
(6)(8xy-x²+y²)-(x²-y²+8xy) (7)(2x²-2/1+3x)-4(x-x²+2/1)
(8)3x²-[7x-(4x-3)-2x²]
(4)3a²+a²-(2a²-2a)+(3a-a²) (5)(5a+4c+7b)+(5c-3b-6a)
(6)(8xy-x²+y²)-(x²-y²+8xy) (7)(2x²-2/1+3x)-4(x-x²+2/1)
(8)3x²-[7x-(4x-3)-2x²]
(1)2(4x-0.5)=8x-1
(2)-3(1-6/1x)=-3+18/1x
(3)-x+(2x-2)-(3x+5)=-x+2x-2-3x-15=-2x-13
(4)3a²+a²-(2a²-2a)+(3a-a²)=4a²-2a²+2a+3a-a²=a²+5a
(5)(5a+4c+7b)+(5c-3b-6a)=-a+4b+c
(6)(8xy-x²+y²)-(x²-y²+8xy)=-2x²+2y²
(7)(2x²-2/1+3x)-4(x-x²+2/1)=2x²-2+3x-4x+4x²-8=6x²-x-10
(8)3x²-[7x-(4x-3)-2x²] =3x²-(3x+3-2x²)=5x²-3x-3
(2)-3(1-6/1x)=-3+18/1x
(3)-x+(2x-2)-(3x+5)=-x+2x-2-3x-15=-2x-13
(4)3a²+a²-(2a²-2a)+(3a-a²)=4a²-2a²+2a+3a-a²=a²+5a
(5)(5a+4c+7b)+(5c-3b-6a)=-a+4b+c
(6)(8xy-x²+y²)-(x²-y²+8xy)=-2x²+2y²
(7)(2x²-2/1+3x)-4(x-x²+2/1)=2x²-2+3x-4x+4x²-8=6x²-x-10
(8)3x²-[7x-(4x-3)-2x²] =3x²-(3x+3-2x²)=5x²-3x-3
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