Question

Explain why 7×11×13+7×11-11 is a composite number?

Answer 1

It is composite number because:-

$7 \times 11 \times 13 + 7 \times 11 - 11$

$7(11 \times 13 + 7 \times 1 - 1)$

$7(143 + 7 - 1)$

$7(149)$

As it have

$factor \: other \: than \: 1 \: and \: itself \: so \: it \: is \: considered \: as \: composite \: no.$

Answer 2

Answer:

Step-by-step explanation:7*11*13+7*11-1 is a composite number

Take 7 common

7(11*13+7*1-1)

Now

7(143+7-1)

7(149)

So,

1 is the common factor so it is a composite number

Hope it will help you