给多项式2x+3y赋予一个实际的意义
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/18 03:42:57
这个多项式=x²-3xy+y²+2x²+xy-4y²=3x²-2xy-3y²;很高兴为您解答,skyhunter002为您答疑解惑如果本题有
(A+2X-Y)*2=(3X+Y)*2-A
是(x-3x²y)-(3x²y-3xy²)=x-3x²y-3x²y+3xy²=x-6x²y+3xy²
差是:(3x+2y)-(4x-2y)=3x+2y-4x+2y=-x+4y
若将x-y看成一个整体,合并多项式(x-y)+3(x-y)-2(y-x),可得6(x-y)
X-Y看成一个整数,合并多项式(X-Y)²+3(X-Y)-2(Y-X),可得?(X-Y)²+3(X-Y)-2(Y-X),=(X-Y)²+3(X-Y)+2(x-y),=(X
[21x^5y^7+y(7x^3y^2)^2]/[-7x^5y^4]=21x^5y^7/[-7x^5y^4]+y(7x^3y^2)^2/[-7x^5y^4]=-3y^3+7x^6y^5/[-7x^5y
(3x-2y)-(4x-2y)=3x-2y-4x+2y=-x
(x-y)2+3(x-y)-2(y-x)=2(x-y)+3(x-y)+2(x-y)=7(x-y)
这个多项式=x²+xy-1/2y²-(3x²+2y²)=x²+xy-1/2y²-3x²-2y²=-2x²+xy
4x^2-3xy-2+5y^2=(4x^2-2)-(3xy-5y^2)
题目是什么再答:A+B=2x^-3xy-y吗
1.-n=3m=2n=-3m=2n^m+nm=9-6=32.a+2a+3a+...+9a+10a+10b+9b+...+3b+2b+b=55*(a+b)=55*(11+1/11)=605+5=6103
n=(2x^2-3x+1)(3x^2y)+5x^3=6x^4y-9x^3y+3x^2y+5^3
3x-2y-(4x-2y)=3x-2y-4x+2y=-x
两人平摊买了a支b元一支的笔的钱
[21x^5y^4+7y(2x^3y^2)^2]÷7x^5y^4=[21x^5y^4+7y×4x^6y^4]÷7x^5y^4=[21x^5y^4+28x^6y^5]÷7x^5y^4=21x^5y^4÷
M÷3x²y=4x²y-1/2x+2∴M=(3x²y)(4x²y-1/2x+2)=12x^4y²-3/2x³y+6x²y
由题意得:差=3x+2y-(4x-2y),=-x+4y.故填:-x+4y.
2y平方+7xy--3x平方