a)(6x-12)(3,4x+17)=0 б)x²-5x+6=0
6x-12=0 или 3,4x+17=0 D=25-24=1
6x=12 3,4x=-17 x1=(5+1)/2=3
x=2 x=-5 x2=(5-1)/2=2
в)3x²+x-7=0
D=1-4(-7×3)=1+84=85
x1=(-1+√85)/6
x2=(-1-√85)/6
a)(6x-12)(3,4x+17)=0 б)x²-5x+6=0
6x-12=0 или 3,4x+17=0 D=25-24=1
6x=12 3,4x=-17 x1=(5+1)/2=3
x=2 x=-5 x2=(5-1)/2=2
в)3x²+x-7=0
D=1-4(-7×3)=1+84=85
x1=(-1+√85)/6
x2=(-1-√85)/6