Verified Answer :

  1. 50a^3b - 8ab = 2 5 5 a a a b - 2 2 2 a b
                             GCF is 2ab (pull those off each term)
                             2ab (25a^2 - 4)
    17. \((k+8)^2\)
    18. \(8m^2-6m-5 = (4m-5)(2m+1)\)
    19. \(n^3+5n^2-9n-45 =(n^2-9)(n+5) = (n+3)(n-3)(n+5)\)
arthurpdc

\(16)~50a^3b-8ab=2ab(25a^2-4)=2ab(5a-2)(5a+2)\\\\ 17)~k^2+16k+64=(k+8)^2\\\\ 18)~8m^2-6m-5=(4m-5)(2m+1)\\\\ 19)~n^3+5n^2-9n-45=n^2(n+5)-9(n+5)=(n^2-9)(n+5)=\\\\=(n-3)(n+3)(n+5)\)

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