搜搜考试网计算:(24x四次y²+12x³y³-8x²y四次)
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/19 00:59:49
把公式打开合并同类项,你会发现X的奇次方项没有了,而X的偶次方项,无论带入正数还是负数都一样.
（-4x²）÷（-2x）+12x³y²÷（-4x²y）-24x四次方y³÷（-4x³y²）=2x-3xy+6xy=2x+3xy=-
(x+y)(x²+y²）（x-y)(x的四次方+y四次方)=(x+y)(x-y)(x^2+y^2)(x^4+y^4)=(x^2-y^2)(x^2+y^2)(x^4+y^4)=(x^
=(x－y)(x＋y)(x²＋y²)(x的4次方＋y的4次方)=(x²－y²)(x²＋y²)(x的4次方＋y的4次方)=(x的4次方－y的4
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①-x·(y-x)³·(x-y)4=(-x)·[-(x-y)³·(x-y)4=x·(x–y)³+4=x·(x–y)7②(x-y)²·(y-x)³·（x
(x+2y)(3x-5y)-(6x⁴y²-2x²y²）÷（2x²y²）=(x+2y)(3x-5y)-2x²y²(3x&
=x的4次方/y²×y的6次方/x³×x的4次方/y的4次方=x的5次方
4x四次y二次-5x二次y二次-9y二次=y^2(4x^4-5x^2-9)=y^2(x^2+1)(4x^2-9)=y^2(x^2+1)(2x+3)(2x-3)
x四次方y四次方-2x²y²-3x四次方y四次方=-2x四次方y四次方-2x²y²=-2x²y²(2x²y²+1)
1、x^5-8x²-x³+8=x²(x³-8)-(x³-8)=(x²-1)(x³-8)=(x+1)(x-1)(x-2)(x&sup
6√3x²y³*3√12x^4/y(x>0,y>0)=6√3x²y²*6√3x^4=6√3(x^6)y²
原式=(x+y)(x-y)(x^2+y^2)(x^4+y^4)=(x^2-y^2)(x^2+y^2)(x^4+y^4)=(x^4-y^4)(x^4+y^4)=x^8-y^8
题目很混乱.我拼凑了一下,没弄出来.你试试将题目拍个图片传上来也好.有些先后什么的歧义了
(X^4-Y^4)/(X²-2XY+Y²)×(Y-X)/(X²+Y²)=(X²+Y²)(X²-Y²)/(X-Y)&sup
令a=2x-y,b=2y-x,a+b=(2x-y)+(2y-x)=x+y(2x-y)四次方+(x+y)四次方+(2y-x)四次方=a四次方+(a+b)四次方+b四次方=(a+b)四次方+(a四次方+2
(X^4-Y^4)/(X²-2XY+Y²)×(Y-X)/(X²+Y²)=(X²+Y²)(X²-Y²)/(X-Y)&sup
(x-2y)^2×(2y-x)^3+(x-2y)×(2y-x)^4=-(x-2y)^(x-2y)^3+(x-2y)^5=-(x-2y)^5+(x-2y)^5=0
x+y=12,所以x+y的平方=12的平方即144x+y的平方=x的平方+2xy+y的平方=144又因为xy=31,所以2xy=62所以x的平方+y的平方=144-62=82x的四次方+y的四次方=（