2 [2x + 1] minus 8 [x + 1] [x minus 1] equals 34

2 [2x + 1] minus 8 [x + 1] [x minus 1] equals 34

2(4x^2 +4x+1)-8(x^2-1)=34
8x^2+8x+2-8x^2+8=34
8x+10=34
8x=24
x=3