4x^2+3x-9/2>0,
8x^2+6x-9>0,
(2x+3)(4x-3)>0,
x3/4.
(1)当x|4x-3|变为
-2x-3>3-4x,x>3;
(2)当x>3/4时,不等式|2x+3|>|4x-3|变为
2x+3>4x-3,x