Originally Posted bybwalters302

For equation 1,

D = (6)^2 - 4(1)(-16) = 100

As D>0 and a>0

It is an equation with two real and different roots.

For equation 2,

D = (5)^2 -4(2)(-7) = 81

As D>0, a>0

This is an equation with two real and different roots.