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Multiply to find answer.

(a+4)(a^2-7a+7)=?

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1 Answer

     (a + 4)(a2 - 7a + 7)

      a·a2 - a·7a + a·7 + 4·a2 - 4·7a + 4·7

      a1+2 - 7a1+1 + 7a + 4a2 - 28a + 28

      a3 - 7a2 + 7a + 4a2 - 28a + 28

      a3 - 7a2 + 4a2 + 7a - 28a + 28

      a3 - 3a2 - 21a + 28 

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