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4x的三次方减去2x的平方减去3x加1等于零

改题列出计算式有: (2X)³-(4X)²+2X =8X³-16X²+2X =2X(4X²-8X+1)

负x平方加2x减三分之二大于零 解:x的平方减2X加三分之二大于零 X的平方-2X+1大于三分之一 (X-1)的平方大于三分之一 X-1大于正负 三分之跟三 X1大于三分之跟三+1,,,X2=负三分之跟三+1

B

-2

是要分解因式么 x³-4x²+4x-1 =x³-1-(4x²-4x) =(x-1)(x²+x+1)-4x(x-1) =(x-1)(x²-3x+1)

(2x-3)²-(x+y)(x-y)-y² ,x²一4x一1=0 ,x²一4x=1 =4x^2-12x+9-x^2+y^2-y^2 =3x^2-12x+9 =3(x^2-4x)+9 =3+9 =12

x²+4x-1=0 x²+4x=1 2x的四次方加8x的三次方减4x的平方减8x加1 =2x²(x²+4x)-4x²-8x+1 =2x²-4x²-8x+1 =-2x²-8x+1 =-2(x²+4x)+1 =-2+1 =-1

不能正常解答

x的四次方减4x的三次方加2x二次方加4x减3 =x^4-4x^3+2x^2+4x-3 =x^4-x^3-3x^3+3x^2-x^2+x+3x-3 =(x^4-x^3)-(3x^3-3x^2)-(x^2-x)+(3x-3) =x^3(x-1)-3x^2(x-1)-x(x-1)+3(x-1) =(x-1)(x^3-3x^2-x+3) =(x-1)[(x^3-3x^2)-(x-3)] =(x-1)[x^2(x-3)-(x-3...

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