a) 1/2(x^-1)>=0
1/2x^-1/2>=0
delta=-4*1/2*-1/2=1
x1=(0-1)/1=-1
x2=(0+1)/1=1
b)-x^-2x+5x+10>0
-x^+3x+10>0
delta=9-4*(-1)*10=9+40=49
x1=(-3-7)/(-2)=5
x2=(-3+7)/(-2)=-2
c)3-2x+3x-2x^<=0
-2x^+x+3<=0
delta=1-4*(-2)*3=1+24=0
x1=(-1-5)/(-4)=(-6)/(-4)=1,5
x2=(-1+5)/(-4)=4/(-4)=-1
d)x^-4>=0
delta= 0-4*(-4)*1=8
x1=(0-√8)/2=(-2√2)/2=-√2
x2=(0+√8)/2=(2√2)/2=√2
