√2y的三次方×√4y等于多少
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x^3-2x^2y^2+xy^3=x(x^2+2xy^2+y^3)很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选为满意回答】按钮,
x^2=y+4,所以x^2-y=4y^2=x+4,所以y^2-x=4x^3-2xy+y^3=(x^3-xy)+(y^3-xy)=x(x^2-y)+y(y^-x)=4x+4yx^2=y+4,y^2=x+
在根9x²y³中,若x≥0,则y≥0,所以根9x²y³=3xy根y.
(x-y)³×(x-y)²×(y-x)=(x-y)³×(x-y)²×[-(x-y)]=-(x-y)的6次方
x³+y³=(x+y)(x²-xy+y²)=x²-xy+y²=(x+y)²-3xy=1-3xy=1/3∴xy=2/9x五次方+y五
x+y=1则x^2+y^2+2xy=1因为x^2+y^2=3则xy=-1x^3+y^3=(x+y)(x^2-xy+y^2)=1*(3+1)=4
x的三次方y的平方+x的平方y三次方=x²y²(x+y)=(xy)²(x+y)=(-2)²*(-3)=-12
解;z(x)=2x+2y²z(y)=4xy+12y²dz=(2x+2y²)dx+(4xy+12y²)dy
原式=x(x²-4y²)-2y(x²-4y²)=(x-2y)(x+2y)(x-2y)=(x+2y)(x-2y)²
直接将二式相乘,得(x²+ax+b)(3x+1)=3x³+x²+3ax²+ax+3bx+b=3x³+(1+3a)x²+(a+3b)x+b由于
解(x-y)(y-x)²(x-y)³=(x-y)(x-y)²(x-y)³=(x-y)^6
由(1)因式分(x+y)²-(x+y)³=(x+y)²(1-x-y)或者(2)计算:(x+y)²-(x+y)³=x²+2xy+y²
(a)^3/2,(x/2y)^3/2且(x
阅读题意,已知X的三次方等于4,y的三次方等于6应该是已知3的x次方等于4,3的y次方等于6因为3^x=4,3^y=6所以(xy)^3=24则9的2x-y次方减27的x-y次方=3^(4x-2y)-3
x^3-y^3=x^3-x^2y+y^2x-yx^2+xy^2-y^3=x^2(x-y)+xy(y-x)+y^2(x-y)=(x-y)(x^2-xy+y^2)
(x+y)^3=x^3+3x^2y+3y^2x+y^3
(x-y)*(x^2+xy+y^2)
题目是不是(x^3+y^3)/(x+y)?应该等于x^2+xy+y^2