(2x+1)^2+5(x-1)^2=(3x+2)(3x-2)-2(4x^2+4x+1)+(5x^2-10x+5)=9x^2-4-29x^2-6x+6=9x^2-4-2-6x=-6-4-2x=2
4X*2 +4X +1+5X*2-10X+5=9X*2-4-2 所以整理得-6X+6=-4-2解得X=2
4x^2+4x+1+5x^2-10x+5=9x^4-6-6x=-12x=2
原式=4x^2+4x+1+5x^2-10x+5=9x^2-4-2x=2