1)delta=169-48=121
x1=[tex] \frac{-13-11}{6} [/tex] =[tex] \frac{-24}{6} [/tex] =-4
x2=[tex] \frac{-13+11}{6} = \frac{-2}{6} = \frac{-1}{3} [/tex]
2)d=25+96=121
x1=-5-11/8=-2
x2=-5+11/8=6/8=3/4
3)d=529-240=289
x1=-23-17/10=-40/10=-4
x2=-23+17/10=-6/10=-3/5
4)d=1+120=121
x1=1-11/4=-10/4=-5/2
x2=1+11/4=12/4=3
5)d=81-56=25
x1=-9-5/14=-1
x2=-9+5/14=-4/14=-2/7
6)d=49+72=121
x1=7-11/12=-4/12=-1/3
x2=7+11/12=18/12=9/6=3/2
