x三次方-2x方 4x x方-4x 4除x方-2x 4 x-2,其中x=4-搜答案-智慧作业帮

2x^2-3x-3/2

5x³-6x²+15x-28____________________x+2)5x⁴+4x³+3x²+2x+15x⁴+10x³_

5X²-2=（√5x+√2)(√5x-√2)x四次方-4x²+4=(x²-2)²=(x+√2)²(x-√2)²x四次方+2x²-8

3x的三次方-[x的三次方+（6x的平方-7x)]-2(x的三次方-3x的平方-4x)=3x³-x³-6x²+7x+2x³-6x²-8x=4x

4*5次方(1+2*-4*方)

=2x^3+4x-1/3x^2-x-3x^2+2x^3=4x^3-10/3x^2+3x=4(-3)^3-10/3(-3)^2+3*(-3)=4*(-27)-10/3*9-9=-108-39=-147

x²y³-2x(4xy³)=x²y³-2x²y³=-x²y³

x2x3+xx4=x2+3+x1+4=2x5再问：谢谢你！

x^4+4x^3+4x^2-9=x^2(x^2+4x+4)-9=x^2(x+2)^2-9=[x(x+2)]^2-9=(x^2+2x)^2-9=(x^2+2x+3)(x^2+2x-3)=(x^2+2x+

=xy(4x²+4xy+y²)=xy(2x+y)²

x^4+4x^3+3x^2+4x+2=x^4+x^2+4x^3+4x+2x^2+2=x^2(x^2+1)+4x(x^2+1)+2(x^2+1)=(x^2+1)(x^2+4x+2)

=[3x(x+1)/(x+1)(x²-x+1)]*[(x²+1)/(x²+1)(x²-1)]*(x-1)²/x]=[3x/(x²-x+1)]

2x³+3x³-4x³=(2+3-4)x³=x³

x^3+4x^2-10=x³+2x²-4x+2x²+4x-8-2=x(x²+2x-4)+2(x²+2x-4）-2=x*0+2*0-2=-2再问：虽然你

X三次方-2X平方-X三次方+5X+4=-2x²+5x+4当x=2时原式=-8+10+4=6

∵x²+y²+6x-2y+10=0∴(x²+6x+9)+(y²-2y+1)=0即(x+3)²+(y-1)²=0由平方的非负性可得(x+3)&

根据Matlab计算结果,不可以再有理数范围内分解.>>symsx>>factor(x^3+4*x+4)ans=x^3+4*x+4>>factor(x^2+4*x+4)ans=(x+2)^2

17x的9次方,上式为2x的9次方-64x的9次方+81x的9次方

顺便说一下,我算的算式是x^4-(2*x)*(2*x)*(2*x)+2^x=4共4个根,都是一样复杂,我给你贴了其中一个.

x三次方-2x平方+x

x^3-2x^2+2=x(x^2-2x+1)=x(x-1)^2