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Can You Give Me The Answers To #'s 18-20 ? Please, Thankyou.

Mathematics
Tutor: None Selected Time limit: 1 Day

Apr 1st, 2015

18. 45b^2+105b+50

   5(9b^2+21b+10)

   5(9b^2+6b+15b+10)

   5(3b(3b+2)+5(3b+2))

   5(3b+2)(3b+5)

19. 5a^2+31a-72

    5a^2+40a-9a-72

    5a(a+8)-9(a+8)

    (5a-9)(a+8)

20. 5k^2-37k-72

      5k^2-45k+8k-72

     5k(k-9)+8(k-9)

     (5k+8)(k-9)

Apr 1st, 2015

Thank You

Apr 2nd, 2015

welcome

Apr 2nd, 2015

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