Question

Factor completely.

3x^2 −147=

Answer 1

3(x - 7)(x + 7)

Explanation:

did on khan academy
hope it helps!

Answer 2

`3(x - 7)(x+7)`

Explanation:

To factor this, you must first take out the GCF (Greatest Common Factor), that
`3x^2` and -147 both have. The terms only have 3 in common, which can be divided with

`3x^2 - 147\\3(x^2 - 49)`

However, we're still not done since 49 is a perfect square and
`(x^2 - 49)` can be split into 2, like so:

`3(x - 7)(x+7)`

If you're unsure about the final answer, you can multiply it all together to see if you got the original expression.