2.化简(1)(2x-y+z-2c+m)(m+y-2x-2c-z)(2)(a+3b)(a^2-3ab+9b^2)-(a-3b)(a^2+3ab+9b^2)(3)(x+y)^2(y+z-x)+(x-y)^2(x+y+z)(x+y-z)卷子明天就交,救命.我只有5分,
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 07:14:08
![2.化简(1)(2x-y+z-2c+m)(m+y-2x-2c-z)(2)(a+3b)(a^2-3ab+9b^2)-(a-3b)(a^2+3ab+9b^2)(3)(x+y)^2(y+z-x)+(x-y)^2(x+y+z)(x+y-z)卷子明天就交,救命.我只有5分,](/uploads/image/z/2464404-60-4.jpg?t=2.%E5%8C%96%E7%AE%80%EF%BC%881%EF%BC%89%EF%BC%882x-y%2Bz-2c%2Bm%29%28m%2By-2x-2c-z%29%282%29%28a%2B3b%29%28a%5E2-3ab%2B9b%5E2%29-%28a-3b%29%28a%5E2%2B3ab%2B9b%5E2%29%283%29%28x%2By%29%5E2%28y%2Bz-x%29%2B%28x-y%29%5E2%28x%2By%2Bz%29%28x%2By-z%29%E5%8D%B7%E5%AD%90%E6%98%8E%E5%A4%A9%E5%B0%B1%E4%BA%A4%2C%E6%95%91%E5%91%BD.%E6%88%91%E5%8F%AA%E6%9C%895%E5%88%86%2C)
2.化简(1)(2x-y+z-2c+m)(m+y-2x-2c-z)(2)(a+3b)(a^2-3ab+9b^2)-(a-3b)(a^2+3ab+9b^2)(3)(x+y)^2(y+z-x)+(x-y)^2(x+y+z)(x+y-z)卷子明天就交,救命.我只有5分,
2.化简
(1)(2x-y+z-2c+m)(m+y-2x-2c-z)
(2)(a+3b)(a^2-3ab+9b^2)-(a-3b)(a^2+3ab+9b^2)
(3)(x+y)^2(y+z-x)+(x-y)^2(x+y+z)(x+y-z)
卷子明天就交,救命.我只有5分,
2.化简(1)(2x-y+z-2c+m)(m+y-2x-2c-z)(2)(a+3b)(a^2-3ab+9b^2)-(a-3b)(a^2+3ab+9b^2)(3)(x+y)^2(y+z-x)+(x-y)^2(x+y+z)(x+y-z)卷子明天就交,救命.我只有5分,
(1)[(2x+z-y)+(m-2c)]*[(m-2c)-(2x+z-y)]=(m-2c)平方—(2x+z-y)平方
=(m-2c)^2-[(x+z)+(x-y)]^2=(m-2c)^2-(x+z)^2-2(x+z)(x-y)-(x-y)^2
(2)=(a+3b)*[(a-3b)^2+3ab]-(a-3b)*[(a+3b)^2-3ab]
=(a+3b)*(a-3b)^2+3ab(a+3b)-(a-3b)*(a+3b)^2+3ab(a-3b)
=[(a+3b)*(a-3b)]*(a-3b)-[(a+3b)*(a-3b)]*(a+3b)+6a^2b
=(a^2-9b^2)*(-6b)+6a^2b=54b^3