-4x²+4x+3>04x²-4x-3<0(2x-3)(2x+1)<0-1/2√（4x-12x+9）²+l2x+1l=√（2x-3）²+l2x+1l=3-2x+2x+1=4
-4x^2+4x+3 >04x^2-4x-3 <0(2x-3)(2x+1) <0-1/2√(4x^2-12x+9) + | 2x+1|=√(3-2x)^2 + | 2x+1|=(3-2x) + (2x+1)=4
