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  • 10-11-2018
  • Mathematics
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Factor the expression. 9b^2-25

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deboada35
deboada35 deboada35
  • 10-11-2018

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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