合并同类项:3(y-x)²-7(y-x)+8(y-x)²+6(y-x)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 16:51:26
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合并同类项:3(y-x)²-7(y-x)+8(y-x)²+6(y-x)
合并同类项:3(y-x)²-7(y-x)+8(y-x)²+6(y-x)
合并同类项:3(y-x)²-7(y-x)+8(y-x)²+6(y-x)
(y-x)(11y-11x-1)
方法:同时提出一个得(y-x)(3y-3x-7+6+8y-8x)=(y-x)(11y-11x-1);
OK
(y-x)(11y-11x-1)
=11(y-x)²-(y-x)
=11y²-22xy+11x²-y+x