Bonsoir,
-(4x²-8x+3)(2x²-5x+3)<0
=>(x-3/2)(x-1/2)(x-1)(x-3/2)>0
x................ 1/2 ........1.........3/2
x-3/2 ...----------------------------0+++++
x-1/2 ..-------0+++++++++++++++++
x-1 .....------------------0+++++++++++
x-3/2....----------------------------0+++++
f(x)......++++0---------0+++++0+++++
f(x)>0 => (x<1/2 ou x >1) et (x≠3/2)