Question

..

Answer 1

what is b^2-4ac

Answer 2

c

Answer 3

do you know how you solve a quadratic by discriminant ?

Answer 4

you need to know when a quadratic has real solution(s) what depend how is the discriminant D

when D > 0
D = 0
D < 0

Answer 5

ok ?

Answer 6

This is an easy quadratic - either factor or use the quadratic forumula, you will have real answers if the discriminant is larger than 0. If it is a negative, then that will create i's in the solution(s).