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26 July, 13:11

The area of a square is found by squaring one of its sides, (A = s ^2). A certain square has an area of z^ 2 + 18z + 81. Factor the trinomial to find a side of the square.

a) side = z + 27

b) side = z + 18

c) side = z + 9

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  1. 26 July, 13:53
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    z^ 2 + 18z + 81 = (z + 9) ^2

    so side = z + 9

    answer: c) side = z + 9
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