Question

explain why (17 * 11 * 2 + 17 * 11 * 5) is a composite number.

Answer 1

⇒17 × 11 × 2 + 17 ×11 × 5
=17×11 (2 + 5)
= 17 × 11 × 7

∵ the above no. has 3 prime factors its a composite no.

Answer 2

explain why (17 × 11 × 2 + 17 × 11 × 5) is a composite number.

(17× 11× 2) + (17× 11× 5)

=17× 11(2+5)

=17× 11× 7

17,11,717,11,7 are factors, so it is composite.