lilxace
lilxace
29-12-2016
Mathematics
contestada
How to factor 9x^2-25
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Drizzt
Drizzt
29-12-2016
9x^2 - 25 = (3x-5)(3x+5)
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bcalle
bcalle
29-12-2016
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
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