How do you factor 4x2−5?

2 Answers
ILuvGaming101
Jun 13, 2017

It is not factorable.

Explanation:

In order for an expression to be factor able, there must be at least a common factor. Here, in this problem, there isn't any.

4 and 5 don't have any common factors and not both terms have an x term. Therefore, this expression is not factorable.

Alan P.
Jun 13, 2017

4x2−5=(2x+√5)(2x−√5)

Explanation:

Remember that:
XXXa2−b2=(a+b)(a−b)

4x2−5 can be written as (2x)2−√52

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