Question

1)3x la patrat+13x+4=0 2)4x la patrat+5x-6=0 3)5x la patrat+23x+12=0 4)2x la patrat-x-15=0 5)7x la patrat+9x+2=0 6)6x la patrat-7x+3=0. Ajutați-mă va rog!!

Answer 1

1)delta=169-48=121
x1=$\frac{-13-11}{6}$ =$\frac{-24}{6}$ =-4
x2=$\frac{-13+11}{6} = \frac{-2}{6} = \frac{-1}{3}$
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