1)(x²-9)/(16x²-8x+1)>0
(x-3)(x+3)/(4x-1)²>0
(4x-1)²>0;=>x€(-oo;1/4)U(1/4;+oo)
(x-3)(x+3)>0;=>x€(-oo;-3)U(3;+oo)
__-3_______1/4________3____
=>x€(-oo;-3)U(3;+oo)
2){3-x>0;x<3
{3-x≠1;x≠4
=>x<3
3){x<3
{x€(-oo;-3)U(3;+oo);=>x€(-oo;-3)
45%=0,45=45/100=9/20
9/20 а -7=1/3 а9/20 а - 1/3 а=727/60 а - 20/60 а=77/60 а=7а=7 : 7/60а=7 * 60/7а=60
1. 5а+2b+b = 5a+3b
2. 4x-2y+5y = 4x+3y
3. -1,2c+d-2,1d = -1,2c - 1,1d