how would u even start this question

[forest glade]

b^2-4ac > 0

should get a range of values for k

then use that to find the domain and range

i meant less then 0

b^2 - 4ac<0

[late elm]

how can u b^2-4ac

what would abc =

[forest glade]

is it not a quadratic

[late elm]

it is