Question

Factor the trinomail, or state that the trinomail is prime.
x^2-7x+12

x^2-x-40

5x^2 -23x +12

7x^2+4x+3

15x^2+22x+8

9x^2-6x-8

Show work.

Answer 1

right. 6 problems? what work are you supposed to show? if it factors you know because when you multiply out you should get the original expression

Answer 2

first one is
\[x^2-7x+12=(x-3)(x-4)\] for example

Answer 3

second one factors but not over integers.

Answer 4

so prime?

Answer 5

no

Answer 6

it depends on what you are factoring over, but it is not prime because it has two real roots. if you want to cheat just type them here
http://www.wolframalpha.com/input/?i=factor+5x^2+-23x+%2B12