CPM Homework Help : CC2MN Problem 7-84

Factor each expression. That is, write an equivalent expression that is a product instead of a sum.

$20y-84$
Hint (a):
In order to write this as a product, you will need to find the common factor of the two terms.
Answer (a):
$4(5y-21)$

$24b^2+96b$
Hint (b):
$24b$ is a factor of both these terms.
Now try writing this sum as a product.