Determine the nature of the roots of the following quadratic equations
1.3x²-5x+4=0
2.3x-2x-5=0
3.2x²+6x+9=0
4.x²+6x+9=0
5.x²+9x+20=0
6.10x²-4x=8
7.x²+5x+10=0
8.x²+6x+3=0
9.9x²-6x+9=0
10.2x²-10x+8=0​