2x^2+1与4x^2-2x-5互为相反数,求x,

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2x^2+1与4x^2-2x-5互为相反数,求x,2x^2+1与4x^2-2x-5互为相反数,求x,2x^2+1与4x^2-2x-5互为相反数,求x,2x^2+1与4x^2-2x-5互为相反数则有:2

2x^2+1与4x^2-2x-5互为相反数,求x,
2x^2+1与4x^2-2x-5互为相反数,求x,

2x^2+1与4x^2-2x-5互为相反数,求x,
2x^2+1与4x^2-2x-5互为相反数
则有:
2x^2+1+4x^2-2x-5=0
6x^2-2x-4=0
3x^2-x-2=0
(x-1)(3x+2)=0
x-1=0
x=1
3x+2=0
x=-2/3
解是x=1,x2=-2/3

2x^2+1与4x^2-2x-5
则2x^2+1=-(4x^2-2x-5)
所以2x^2+1=-4x^2+2x+5
6x^2-2x-4=0
3x^2-x-2=0
(x-1)(3x+2)=0
所以x=1 或x=-2/3