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3 years ago

7

Factor the expression. 9b^2-25

1 answer:

Masteriza [31]3 years ago

3 0

you must factorize it as a difference of squares

a^2-b^2 = (a-b)(a+b),

9b^2-25 = (3b)^{2-(5)^2= (3b-5)(3b+5)

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