x²y-3xy²+2yx²-y²x(列算式)
来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 01:05:36
x²y-3xy²+2yx²-y²x(列算式)
x²y-3xy²+2yx²-y²x(列算式)
x²y-3xy²+2yx²-y²x(列算式)
x²y-3xy²+2yx²-y²x
=(1+2)x²y-(3+1)xy²
=3x²y-4xy²
x²y-3xy²+2yx²-y²x
=(x²y+2x²y)+(-3xy²-xy²)
=3x²y+(-4xy²)
=3x²y-4xy²
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来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 01:05:36
x²y-3xy²+2yx²-y²x(列算式)
x²y-3xy²+2yx²-y²x(列算式)
x²y-3xy²+2yx²-y²x(列算式)
x²y-3xy²+2yx²-y²x
=(1+2)x²y-(3+1)xy²
=3x²y-4xy²
x²y-3xy²+2yx²-y²x
=(x²y+2x²y)+(-3xy²-xy²)
=3x²y+(-4xy²)
=3x²y-4xy²