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

True
False

Question

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

True
False

Nnesha · Answer

hi

Nnesha · Answer

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

Nnesha · Answer

Nnesha · Answer

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

ambercatrastrphe · Answer

just to be sure, its true right?

Nnesha · Answer

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

Nnesha · Answer

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