作业帮已知A=4x²-1/3x+1,B=3x²+2/3x-4,求5A-3B-[5A-(A+2B)]
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/26 15:39:58
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已知A=4x²-1/3x+1,B=3x²+2/3x-4,求5A-3B-[5A-(A+2B)]
已知A=4x²-1/3x+1,B=3x²+2/3x-4,求5A-3B-[5A-(A+2B)]
已知A=4x²-1/3x+1,B=3x²+2/3x-4,求5A-3B-[5A-(A+2B)]
5A-3B-[5A-(A+2B)]
=5A-3B-5A+A+2B
=A-B
=(4x²-1/3x+1)-(3x²+2/3x-4)
=4x²-1/3x+1-3x²-2/3x+4
=x²-x+5.