asked 209k views
1 vote
How to factor 9x^2-25

How to factor 9x^2-25-example-1
asked
User Firula
by
8.0k points

2 Answers

1 vote
Since the 9 and 25 are both perfect squares and it is a difference (subtraction), you have a difference of perfect squares. This always factors to the form
(a+b)(a-b).
(3x-5)(3x+5) is the answer
answered
User Shiniece
by
7.6k points
1 vote
9x^2 - 25 = (3x-5)(3x+5)

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