Question

b2 - 4ac > -1 means the root is real.

True
False

Answer 1

hi

Answer 2

\[\huge\rm x=\frac{ -b \pm \sqrt{\color{red}{b^2-4ac}} }{ 2a }\] the red part is known as discriminant which help us figure out how many real roots are there.

Answer 3

source: http://www.biology.arizona.edu/biomath/tutorials/Quadratic/Roots.html

Answer 4

just to be sure, its true right?

Answer 5

is the right hand side -1 or supposed to be 0 ?

Answer 6

if it's greater than -1 then it can be between -1 to 0
according to the table if it's less than 0 there are no real roots