Question

Serena is writing an expression that is equivalent to 12ab – 6b, but she has not completed it.

Answer 1

Answer:

the person above me is correct!!!!!!!

Step-by-step explanation:

Answer 2

Given:

The expression is

$12ab-6b$

The equivalent expression of this expression is

$\_\_\_?\_\_\_(2a-1)$

To find:

The missing value.

Solution:

We have,

$12ab-6b$

The factor form of $12ab$ is

$12ab=2\times 2\times 3\times a\times b$

The factor form 6b is

$6b=2\times 3\times b$

The common factors of $12ab$ and $6b$ are $2,3,b$.

$HCF(12ab,6b)=2\times 3\times b$

$HCF(12ab,6b)=6b$

Taking out the highest common factors(HCF) from the given expression, we get

$12ab-6b=6b(2a-1)$

On comparing this with $\_\_\_?\_\_\_(2a-1)$, we get the missing value which is equal to $6b$.

Therefore, the correct option is A.