合并下列各式中的同类项,要有过程。
①15x+4x-10x②﹣6ab+ba+8ab③﹣p²-p²-p²④m-n²+m-n²⑤x³-x³+...
①15x+4x-10x
②﹣6ab+ba+8ab
③﹣p²-p²-p²
④m-n²+m-n²
⑤x³-x³+x³
⑥x-0.3y-x+0.3y
⑦3x²-1-2x-5+3x-x²
⑧6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
⑨4x²y-8xy²+7-4x²y+12xy²-4
(10) a²-2ab+b²+2a²+2ab-b² 展开
②﹣6ab+ba+8ab
③﹣p²-p²-p²
④m-n²+m-n²
⑤x³-x³+x³
⑥x-0.3y-x+0.3y
⑦3x²-1-2x-5+3x-x²
⑧6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
⑨4x²y-8xy²+7-4x²y+12xy²-4
(10) a²-2ab+b²+2a²+2ab-b² 展开
1个回答
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解:
①15x+4x-10x=19x-10x=9x
②﹣6ab+ba+8ab=8ab-5ab=3ab
③﹣p²-p²-p²=-3p^2
④m-n²+m-n²=2m-2n^2
⑤x³-x³+x³=x^3
⑥x-0.3y-x+0.3y=0
⑦3x²-1-2x-5+3x-x²=2x^2+x-6
⑧6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y=-7x²y²-3xy-7x
⑨4x²y-8xy²+7-4x²y+12xy²-4=4xy²+7
(10)a²-2ab+b²+2a²+2ab-b²=3a²
①15x+4x-10x=19x-10x=9x
②﹣6ab+ba+8ab=8ab-5ab=3ab
③﹣p²-p²-p²=-3p^2
④m-n²+m-n²=2m-2n^2
⑤x³-x³+x³=x^3
⑥x-0.3y-x+0.3y=0
⑦3x²-1-2x-5+3x-x²=2x^2+x-6
⑧6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y=-7x²y²-3xy-7x
⑨4x²y-8xy²+7-4x²y+12xy²-4=4xy²+7
(10)a²-2ab+b²+2a²+2ab-b²=3a²
追问
是合并同类项。。。
追答
对呀,合并同类项过程和结果就是这样的啊!
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