when writing a repeating decimal as a fraction, why does the fraction always have only 9s or 9s and 0s as digits in the denomina
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Sorry for the hand writing. But you want to factor out a 4y^2 which will result in (9y^2-1). Then you will factor out the equation in parentheses to (3y-1)(3y+1). Don’t forget to put the 4y^2 out front!
