2(x²-1/2)-x四次方
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2(x²-1/2)-x四次方2(x²-1/2)-x四次方2(x²-1/2)-x四次方2(x²-1/2)-x^4=2x²-1-x^4=-(x^4-2x&
2(x²-1/2)-x四次方
2(x²-1/2)-x四次方
2(x²-1/2)-x四次方
2(x²-1/2)-x^4
=2x²-1-x^4
=-(x^4-2x²+1)
=-(x²-1)²
=-(x+1)²(x-1)²
这是要解方程呢还是要分解呢,提问题也不提清楚
2(x^4-x^3-x+1)=2[x^3(x-1)-(x-1)]=2(x-1)(x^3-1)=2(x-1)(x-1)(x²+x+1)
=2(x-1)²(x²+x+1/4+3/4)=2(x-1)²[(x+1/2)²+3/4]
这样可以么?