# Math

An open gift box is to be made from a square piece of material by cutting four-centimeter squares from each corner and turning up the sides (see figure). The volume of the finished gift box is to be 324 cubic centimeters. Find the size of the original piece of material.

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1. height = 4 cm
length = width = x-8

(x-8)(x-8)4 = 324
x^2 -16 x + 64 = 81

x^2 - 16 x - 17 = 0

(x-17)(x+1) = 0
well it is not -1 so
x = 17
17 by 17

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