Question

b^2 -4ac>0 means the root is real, True or false?

Answer 1

true, since the radical is not negative

Answer 2

Look up what b^2-4ac (the discriminant) means

Answer 3

robz, can you tell us why we have to take a radical though?

Answer 4

Just trying to get her to learn.

Answer 5

because the quadratic equation has b^2 -4ac under the radical

Answer 6

Thanks guys(:

Answer 7

can't take the square root of a negative number without complex numbers

Answer 8

robz8, that is correct, but do you know why the quadratic equation has b^2-4ac under the radical?

Answer 9

haha do you want me to proof the quadratic equation?

Answer 10

I know that radicals can't be negitive.

Answer 11

well they can, but their result would be complex numbers, making them imaginary

Answer 12

Well thats why they wouldn't be real then.