Question

What multiplies to be -20 and adds to be -5?

Answer 1

factors of 20 :
1 * 20 ----> -1+20 or 1-20 cant be -5
2 * 10 ----> -2+20 or 2-10 cant be -5
4 * 5 ----> -4+5 or 4-5 cant be -5

so, there is no numbers satisfies for this case

Answer 2

is this about quadratic equation, @ninjawolfjj ?

Answer 3

so it's prime? (Trinomial)

Answer 4

actually, yes. A prime trinomial can not be written as the product of lower degree polynomials or we can say that prime trinomials can not be factored.