29.1k views
1 vote
Factor completely.

3x^2 −147=

User Cristea
by
7.5k points

2 Answers

2 votes

Answer:

3(x - 7)(x + 7)

Explanation:

did on khan academy
hope it helps!

User Nisha Salim
by
8.0k points
7 votes

Answer:


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.

User Obo
by
8.9k points
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