10x^2-7x^+1=0
-4x^2-6x+18=0
-15x^2+23x-4=0
2x^2+x-10=0
12x^2+5x-3=0
18x^2-21x+5=0
6x^2-13x-8=0
-4x^2-6x+18=0
-15x^2+23x-4=0
2x^2+x-10=0
12x^2+5x-3=0
18x^2-21x+5=0
6x^2-13x-8=0
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Answers & Comments
Х1=7+3/20=0.5
X2=7-3/20=0.2
2) D=36-4 x (-4) x 18=18
X1=6-18/-8=1.5
X2=6+18/-8=-3
3)D=1-4 x 2 x(-1)=9
X1=-1+9/4=2
X2=-1-9/4=-2.5
4)D=25-4 x 12 x (-3)=13
X1=-5+13/24=0.3
X2=-5-13/24=-0.75
5)D=441-4 x 18 x 5=9
X1=21+9/36=0.83
X2=21-9/36=0.3
6)D=169-4 x 6x (-8)=19
X1=13+19/12=2.6
X2=13-19/12=-0.5
7)D=529-4 x (-15) x(-4)=17
X1=-23+17/-30=0.2
X2=-23-17/-30=1.3
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