Problem

Factor each of the following whole numbers using three factors. Do not use the factor 1...

Factor each of the following whole numbers using three factors. Do not use the factor 1 in your answer. See Example 2.

30

Reference Example 2

Factor 40 using a. two factors b. three factors

Strategy We will find a pair of whole numbers whose product is 40 and three whole numbers whose product is 40.

Why To factor a number means to express it as the product of two (or more) numbers.

Solution

a. To factor 40 using two factors, there are several possibilities.

40 = 1 · 40, 40 = 2 · 20, 40 = 4 · 10, and 40 = 5 · 8

b. To factor 40 using three factors, there are several possibilities. Two of them are:

40 = 5 · 4 · 2 and 40 = 2 · 2 · 10

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