Answer:
1. 3x²-2x-5=0
2. x²-5x+4=0
3. 2x²-3x-20=0
4. 3x²-2x-6=0
5. x²+5x+4=0
1. a=3, b=2, c=-5
2. a=1, b =-5 c=4
3. a=2 b=-3 c=-20
4. a=3 b=-2 c=-6
5. a=1 b=5 c=4
