1)2x²-x>0x(2x-1)>0x=0 U x=1/2x∈(-∞;0) U (1/2;∞)2x²-x=12x²-x-1=0D=1+8=9>0 x1+x2=1/22)x>0 U x-2>0⇒x>2x∈(2;∞)log(3)[x*(x-2)]=1x²-2x=3x²-2x-3=0D=4+12=16>0x1+x2=23)x²-3>0x=-√3 U x=√3x∈(-∞;-√3) U (√3;∞)x²-3=1x²=4x1=-2 U x2=2x1+x2=04)x²+x>0x(x+1)>0x=0 x=-1x∈(-∞;-1) U (0;∞)x²+x=2x²+x-2=0D=1+8=9>0x1+x2=-1