Question

Find the discriminant of the following equation.

4x2 + 12x + 9 = 0

Answer 1

do you know the equation to find a discriminant first of all?

Answer 2

ax^2+x+c=0 right?

Answer 3

no, not quite. that is almost the form for a standard quadratic equation, it should actually be ax^2+bx+c=0. anyway, to find the discriminant, you must plug in the correct numbers to the equation:
b^2-4ac

can you do that and tell me what you get?

Answer 4

k

Answer 5

how would i plug it in

Answer 6

hint:
a=4
b=12
c=9

can you do it now?

Answer 7

k

Answer 8

but how would i solve it???

Answer 9

its zero

Answer 10

yes! so the discriminant is 0

Answer 11

lol ok