in an ap,the first term of an arithmetic series is 5,the last term is 45 and the sum is 400. find the number of terms and common
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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!
