Question

The polynomial given below has _____ root(s).
2x^2+5x+2
A) two complex
B) one positive and one negative
C) two negative
D) two positive

Answer 1

Factorize it and get the roots:

\[2x^2 + 4x + x + 2 \implies (x+2)(2x + 1) = 0\]

Find x that will be the roots..

Answer 2

The other way is to note that there are no sign changes, so no positive roots, that if you put -x for x you have 2 sign changes so 2 negative roots

Answer 3

so two negative roots?

Answer 4

Yes..

Answer 5

thanks. :)