[(x y)的3次方-2(x y)的2平方-4(x y)]除(x y)
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-xy(x的2次方y的5次方-xy的3次方-y)=-xy²(x²y的4次方-xy²-1)=-(xy²)[(xy²)²-(xy²)-
原题目如下:-xy(x³y七次方-3x²y五次方-y)=-xy[(x³y^6)y-3(x²y^4)y-y]=-xy[(xy²)³y-3(xy
--3(2x的2次方--xy)+4(x的2次方+xy--6)=--6x^2+3xy+4x^2+4xy--24=--2x^2+7xy--24.
x^2+xy=3xy+y^2=2相加,左边和左边相加,右边和右边相加x^2+xy+xy+y^2=3+2所以x^2+2xy+y^2=5
(3X^2-5XY)+{-X^2-[-3XY+2(X^2-XY)+Y^2]}=3X^2-5XY-X^2+3XY-2X^2+2XY+Y^2=Y^2
原式=-6x²+3xy+4x²+4xy-24=-2x²+7xy-24
=7xy+15x²+2xy³是4次三项式7xy15x²2xy³这样三项单项所有未知数次数相加最高的项2xy³1+3=四次
-2x²-12xy²+8xy³=-2x(x+6y²-8y³)4(x+y)²-2(x+y)=2(x+y)(2x+2y-2)2(x-y)
2x的3次方减去0.5xy的3次方-2/3xy的3次方-xy的3次方-0.25x的3次方y=2x³-0.5xy³-2/3xy³-xy³-0.25x³y
x^3+2xy-x-xy^2=x^3-x(y-1)^2=x(x^2-(y-1)^2)=x(x-y+1)(x+y-1)x^3x的3次方的意思^2这是2次方!看得懂吧
15乘以X的平方加9(4x)^2+3xy-x^2-3xy+9=16(x^2)-(x^2)+9=15(x^2)+9再问:先化简,在求值,同学,我要过程!
原式=3x²y+3xy-4xy+8x²y+xy=11x²y
原式=3x的2次方y/(-1/2xy)-xy的2次方/(-1/2xy)+1/2xy/(-1/2xy)=-6x+2y-1
再问:那个4y-1是怎么来的??再答:用前边的多项式的每一项除以公因式
三进制则最大数字是2所以是222x2+x=1x2+x+1/4=1+1/4(x+1/2)2=5/4x+1/2=±√5/2x=(-1-√5)/2,x=(-1+√5)/2
=2xy³×1/4xy-1/4x²y的4次方=1/2x²y的4次方-1/4x²y的4次方=1/4x²y的4次方再问:再答:你的照片拍的很大,但指数看不
-5(xy-2x^2)+(5xy-x^2)-2(3x^2-5xy)=-5xy+10x^2+5xy-x^2-6x^2+10xy=(10x^2-x^2-6x^2)+(-5xy+5xy+10xy)=3x^2
-2x的平方-12xy的2次方+8xy的3次方=-2x(x+6y²-4y³)
xy+(-3x²y²)+(-5xy)+(-2x²y²)+4xy=xy-3x²y²-5xy-2x²y²+4xy=-5x
A=3X^2-2XYB=Y^2+XYC=X^2-XY+Y^2=(x-y)^2-xy题目不完整再问:不用了