Question

Which polynomial is prime?
a.4x^2-17x+15
b.8x^2+7x-16
c.4x^2+13x
d.x^2-4

Answer 1

Over the integers, the rationals?

Answer 2

B over the rational

Answer 3

you need to put them in the form ax^2 + bx + c = 0

if the descriminate (b^2-4ac) is a perfect square, then it's not prime..

Answer 4

so wouldn't it be a?

Answer 5

no

Answer 6

a can be factored the descriminant is 49

Answer 7

\[
4 x^2-17 x+15=(x-3) (4 x-5)
\]

Answer 8

Did you get it?

Answer 9

c, cause its not factor able right

Answer 10

am I right?

Answer 11

I meant b! not c

Answer 12

b is the answer