3x²-28+65=0
1 -5
3 -13
(x-5)(3x-13)=0
x=5或x=13/3
2n²-3n+1=0
1 -1
2 -1
(n-1)(2n-1)=0
n=1或n=1/2
3x²+4x+1=0
1 1
3 1
(x+1)(3x+1)=0
x=-1或x=-1/3
4x²-13x+3=0
1 -3
4 -1
(x-3)(4x-1)=0
x=3或x=1/4
11x²-76x-96=0
1 -8
11 12
(x-8)(11x+12)=0
x=8或x=-12/11
x²-12x+27=0
1 -3
1 -9
(x-3)(x-9)=0
x=3或x=9
5x²-18x+9=0
1 -3
5 -3
(x-3)(5x-3)=0
x=3或x=3/5