SOLUTION: Factorise 9t^2-5r^2

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Question 1049459: Factorise 9t^2-5r^2
Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
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9t^2-5r^2 = (3t - sqrt(5)*r)*(3t + sqrt(5)*r).