解不等式:3(x+2)＾2-3(x+1)(x-1)≤12x＾2-(6x-3)(2x+1)(需过程)
问题描述：
解不等式:3(x+2)＾2-3(x+1)(x-1)≤12x＾2-(6x-3)(2x+1)(需过程)
答
3(x^2+2x+4)-3(x^2-1)≤12x^2-(12x^2-6x+6x-3)
3x^2+6x+12-3x^2+3≤12x^2-12x^2+3
6x+15≤3
x≤-2