计算-8x²y*3x 4y÷x²y z
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等于1/X*(X-Y)
x·(9x³y-3xy²)÷(﹣3x²y)=(9x³y-3xy²)÷(﹣3xy)=-3x²+y如果本题有什么不明白可以追问,请点击下面的【选
我怕来不及,等等发给你!再问:慢慢来,,,,,,再问:还没好??
-x^y^7+y^8)(这里有问题,x的几次方?再问:就是一次方再答:(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-xy^7+y^8)(x^2+xy+y^2)=(x^8-x^7y+x^
多项式2x3y2-3x2y3-5x4y+6xy4-5中,x的系数依次3,2,4,1,按x的降幂排列是-5x4y+2x3y2-3x2y3+6xy4-5.
原式=(X+Y)^5÷(-(X+Y)^3)*(X-Y)²=-(X+Y)^(5-3)*(X-Y)²=-(X+Y)²(X-Y)²=-((X+Y)(X-Y))&sup
3x/8y×16y²/27x²=2y/9x(2xy-x²)÷x-2y/xy=-x(x-2y)×xy/(x-2y)=-x²y2x-6/x²-4x+4×2
(1)3x/8y×16y²/27x²=(3/8×16/27)×(y/x)=2y/9x(2)(2xy-x²)÷x-2y/xy=x(2y-x)×[xy/(x-2y)]=-x&
(x—y)^7÷(y—x)^6+(—x—y)^3÷(x+y)^2=x-y-(x+y)=-2y
解6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^4-16x³y^5)÷4x²y³=12x³
(x+y)(x+y)^2(-x-y)^3=-(x+y)^6
(-x-2y)*(3x-y)=-3x^2-5xy+2y^2
【2(x-y)²-8(x-y)²(x+y)+6y(x-y)²】÷2(x-y)²=2(x-y)²÷2(x-y)²-8(x-y)²(x
(1)(-2x)^3-3x乘(x-2x^2)=-8x³-3x²+6x³=-2x³-3x²=-x²(2x+3)(2)[(x+2y)^2-(x-
(2x+y)(x-3y)=2x(x-3y)+y(x-3y);y(x-3y)+y(x+3y)=2xy;所以2x(x-3y)+2xy=2x(x-3y+y)=2x(x-2y);2x(x-2y)÷(2x)=x
1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8y^7/(x^8+y^8)=【(x+y)-(x-y)】/(x-y)(x+y)-2y/(x^2+y^2)-4y^
8x²y^4(-3x/4y²)/(-x²y/2)=2x²(-3x)y²/(-x²y/2)=12xy
解代数式得:-3x的平方y-2y的三次方因为1/2的平方=-1/2的平方,所以结果仍正确给分吧!嘿嘿!
原式=(3x+y+3x-y)(3x+y-3x+y)÷2(2x-y)=12xy÷2(2x-y)=6xy/(2x-y)
(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2=(x-y)^7÷(x-y)^6+[-(x+y)^3]÷(x+y)^2=(x-y)+[-(x+y)]=x-y-x-y=-2y