Answer:
1. b²+9b+7=0
a= 1, b= 9, c= 7
Discriminant:
b²-4ac
(9)²-4(1)(7)
81-28= 53
Nature of roots: Real, irrational and unequal
2. t²+16t-16=0
a= 1, b= 16, c= -16
Discriminant:
b²-4ac
(16)²-4(1)(-16)
256+64= 320
Nature of roots: Real, irrational and unequal
3. z²+25z-100=0
a= 1, b= 25, c= -100
Discriminant:
b²-4ac
(25)²-4(1)(-100)
625+400= 1025
Nature of roots: Real, irrational and unequal
