先化简,再求值:(3x+2)(3x-2)-5x(x+1)-(x-1)平方,其中x²-x-2012=0

:(3x+2)(3x-2)-5x(x+1)-(x-1)²
=9x²-4-5x²-5x-x²+2x-1
=3x²-3x-5
=3(x²-x)-5
=3×2012-5
=6031
1-（7x-1）/8>（3x-2）/4
8-7x+1＞6x-4
-13x＞-13
x＜1
-3（x-2）≥4-x →-3x+x≥4-6 →-2x≥-2 x≤1
（2x-5）/3＜x-1 →2x-5＜3x-3 →-x＜2 x＞-2
所以-2＜x≤1 -1 0 1