(1):5(a²b-2ab²+c)-4(2c+3a²b-ab²);
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/04 15:16:35
(1):5(a²b-2ab²+c)-4(2c+3a²b-ab²);
(2):(x²-2y-z²)-(-γ²+3x²-z²)+(5x²-γ²+2z²)
(3):-{2a²b-[2abc-(4ab²-a²b)]}
第二题写错了,第一个括号里应该是2y的平方
应该是:
(2):(x²-2y²-z²)-(-γ²+3x²-z²)+(5x²-γ²+2z²)
第三题也写错了,应该是:
(3):-{2a²b-[3abc-(4ab²-a²b)]}
(2):(x²-2y-z²)-(-γ²+3x²-z²)+(5x²-γ²+2z²)
(3):-{2a²b-[2abc-(4ab²-a²b)]}
第二题写错了,第一个括号里应该是2y的平方
应该是:
(2):(x²-2y²-z²)-(-γ²+3x²-z²)+(5x²-γ²+2z²)
第三题也写错了,应该是:
(3):-{2a²b-[3abc-(4ab²-a²b)]}
![(1):5(a²b-2ab²+c)-4(2c+3a²b-ab²);](/uploads/image/z/1505817-9-7.jpg?t=%EF%BC%881%EF%BC%89%EF%BC%9A5%EF%BC%88a%26sup2%3Bb-2ab%26sup2%3B%2Bc%EF%BC%89-4%EF%BC%882c%2B3a%26sup2%3Bb-ab%26sup2%3B%EF%BC%89%EF%BC%9B)
1:
5(a²b-2ab²+c)-4(2c+3a²b-ab²)
=5a²b-10ab²+5c-8c-12a²b+4ab²
=-7a²b-3c-6ab²
2:
(x²-2y²-z²)-(-γ²+3x²-z²)+(5x²-γ²+2z²)
=x²-2y²-z²+γ²-3x²+z²+5x²-γ²+2z²
=3x²-2y+2z²
3:
-{2a²b-[3abc-(4ab²-a²b)]}
= -{2a²b-[2abc-4ab²+a²b]}
= -{2a²b-2abc+4ab²-a²b}
= -2a²b+2abc-4ab²+a²
5(a²b-2ab²+c)-4(2c+3a²b-ab²)
=5a²b-10ab²+5c-8c-12a²b+4ab²
=-7a²b-3c-6ab²
2:
(x²-2y²-z²)-(-γ²+3x²-z²)+(5x²-γ²+2z²)
=x²-2y²-z²+γ²-3x²+z²+5x²-γ²+2z²
=3x²-2y+2z²
3:
-{2a²b-[3abc-(4ab²-a²b)]}
= -{2a²b-[2abc-4ab²+a²b]}
= -{2a²b-2abc+4ab²-a²b}
= -2a²b+2abc-4ab²+a²
(1):5(a²b-2ab²+c)-4(2c+3a²b-ab²);
计算:7a²b-(-4a²b+5ab²)-2(2a²b-3ab²)
2(a²b+3ab²)-3(a²b-1)-2a²b-2
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化简:5(a²b-3ab²)-2(2a²-7ab²)
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化简:(b²-a²)/(a²-2ab+b²)
2(a²-ab)-4(2a²-3ab)-2【a²-(2a²-ab+b²
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