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12 April, 02:25

The area of a square is found by squaring one of its sides, (A = s2). A certain square has an area of z2 + 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. 12 April, 02:49
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    A = s²

    A = z² + 18 z + 81

    z² + 18 z + 81 = z² + 9 z + 9 z + 81 = z (z + 9) + 9 (z + 9) =

    = (z + 9) (z + 9) = (z + 9) ²

    Answer:

    C) side = z + 9
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