降次方法
发布网友
发布时间:2022-05-02 21:49
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热心网友
时间:2022-06-27 14:21
如果x平方-3x+1=0
x^2=3x-1
x^3=x*x^2
=x*(3x-1)
=3x^2-x
=3*(3x-1)-x
=9x-3-x
=8x-3
x^4=x^2*x^2
=(3x-1)*(3x-1)
=9x^2-6x+1
=9*(3x-1)-6x+1
=27x-9-6x+1
=21x-8
x^5=x^3*x^2
=(8x-3)(3x-1)
=24x^2-17x+3
=24(3x-1)-17x+3
=72x-24-17x+3
=55x-21
热心网友
时间:2022-06-27 14:22
X立方=X方乘X=3X方-X=3(3X-1)-X=8X-3