Question

Using the discriminant formula how will you determine the nature of the roots for x^2-4x-5 ?

Answer 1

\[D = b^2 - 4ac\]

a = 1, b = -4 and c= -5

\[D = 16 - 20 = -4\]

Note these points:

\[\large D > 0\]
There will be two real and distinct roots..

\[\large D = 0\]
There will be two real but equal roots.

\[\large D < 0\]
There will be two complex roots..

Answer 2

Here D is less than 0, so which condition applies here??

Answer 3

there are 2 complex roots.

Answer 4

thank you

Answer 5

Welcome dear..