Question

Check by multiplying. If a polynomial is prime, state this.

2a^2 − 4a − 70

Answer 1

divide by 2
2(a^2 - 2a - 35)
= 2(a - 7)(a + 5)

Answer 2

not prime

Answer 3

Thank you! How do I know if it is a prime or not?

Answer 4

if its prime you would not be able to factor it

Answer 5

So would this be a prime? 15a2 − 5ab − 20b2
5(3a - 4b) (a + b)-----Answer

Answer 6

- non prime

Answer 7

Ok thank you

Answer 8

yw