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Find a so that ax^2 + 15x + 4 + 3x + 5 is the square of a binomial.

 Apr 11, 2021
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a x^2 + 18x + 9    divide by 9

a/9  x^2 + 2x + 1       a/9 = 1      so  a = 9

   9* (x+1)^2  =

      (3x+3)2

 Apr 11, 2021

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