8x的三次方减一因式分解
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X³+Y³=(X+Y)(X²-XY+Y²)
64(x+1)的三次方-27=0(x+1)的三次方=27/64x+1=3/4x=3/4-1x=-1/4
8(x+y)的三次方+1=[2(x+y)+1][4(x+y)²-2(x+y)+1]=(2x+2y+1)(4x²+8xy+4y²-2x-2y+1)如果本题有什么不明白可以追
(x-2y)³+8x²y-16xy=(x-2y)³+8xy(x-2y)=(x-2y)[(x-2y)²+8xy]=(x-2y)[x²-4xy+4y
x三次方+8=(x+2)(x^2-2x+4)
3x²+3x+13²-4*3*1=-3<0故不能因式分解
x^3-9x+8=x^3-1-9x+9=(x-1)(x^2+x+1)-9(x-1)=(x-1)(x^2+x-8)
4x³-xy²=x(4x²-y²)=x(2x-y)(2x+y)
=(y-x)^3-(y-x)=(y-x)[(y-x)^2-1]=(y-x)(y-x+1)(y-x-1)
x³+y³=x³+x²y-x²y-xy²+xy²+y³=x²(x+y)-xy(x+y)+y²(x+y
=xy(4x²+4xy+y²)=xy(2x+y)²
x的三次方+8y三次方=(x+2y)(x平方-2xy+4y平方)
9x的三次方-25xy的平方=x(9x²-25y²)=x(3x+5y)(3x-5y)
x³y-xy³=xy(x²-y²)=xy(x+y)(x-y)
8x^3-4x^2=4x^2(2x-1)
4x的三次方+4x²+x=X(4X平方+4X+1)=X(2X+1)平方
2x减x的三次方=2x-x³=x(2-x²)=x(√2+x)(√2-x)
您好:x的三次方(y-x)的三次方-(x-y)的三次方=x的三次方(y-x)的三次方+(y-x)的三次方=(x³+1)(y-x)³=(x+1)(x²-x+1)(y-x)&
解x^3-8=x^3-2^3=(x-2)(x^2+2x+4)公式a^3-b^3=(a+b)(a^2+ab+b^2)再问:谢谢🌹🌹🌹再答:不用客气
原式=2³+(x/3)³=(2+x/3)(4-2x/3+x²/9)再问:8+x³/27=2³+(x/3)³=(2+x/3)(4-2x/3+x