1) 6x²+x-7=0
D=1-4×6×(-7)=169, √D=13
x1=(-1+13)/2×6=1
x2=(-1-13)/2×6=-14/12=-7/6
2) x²-4x+3=0
D=16-4×3=4, √D=2
x1=(4+2)/2=3
x2=(4-2)/2=2
1) 6x²+x-7=0
D=1-4×6×(-7)=169, √D=13
x1=(-1+13)/2×6=1
x2=(-1-13)/2×6=-14/12=-7/6
2) x²-4x+3=0
D=16-4×3=4, √D=2
x1=(4+2)/2=3
x2=(4-2)/2=2