来自陈珮珮的问题
已知4X^2-2X-1=0,求(12X^5-6X^4-7X^3+2X^2+1)/(2X^3-X+1)的值
已知4X^2-2X-1=0,求(12X^5-6X^4-7X^3+2X^2+1)/(2X^3-X+1)的值
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2020-06-20 22:28
已知4X^2-2X-1=0,求(12X^5-6X^4-7X^3+2X^2+1)/(2X^3-X+1)的值
已知4X^2-2X-1=0,求(12X^5-6X^4-7X^3+2X^2+1)/(2X^3-X+1)的值
lijuan8687833:12x^5-6x^4-7x^3+2x^2+1=4x^2(3x^3-x+1)-2x(3x^3-x+1)-(3x^3-x+1)-4x^2+2x+2=(3x^3-x+1)(4x^2-2x-1)-(4x^2-2x-1)+1=0-0+1=12x^3-x+1=1/2(4x^3-2x+2)=1/2[x(4x^2-2x-1)+2x^2-x+2]=1/2[x(4x^2-2x-1)+1...