Answer:
a) Prime factorization of 396: 2² × 3¹ × 11¹
b) Factors of 396: 88 and 9.
Explanation:
a) To find the prime factorization of 396, we can start by dividing it by the smallest prime number, which is 2:
396 ÷ 2 = 198
Now we can write:
396 = 2 × 198
Next, we can divide 198 by 2 again:
198 ÷ 2 = 99
So we have:
396 = 2 × 2 × 99
Now we need to find the prime factorization of 99. We can start by dividing it by 3:
99 ÷ 3 = 33
So we can write:
396 = 2 × 2 × 3 × 33
Now we need to find the prime factorization of 33. We can start by dividing it by 3 again:
33 ÷ 3 = 11
So we have:
396 = 2 × 2 × 3 × 11 × 1
We don't need to include the factor of 1, so we can write the prime factorization of 396 in index form as:
396 = 2² × 3¹ × 11¹
b) To find which two of the given numbers are factors of 396, we need to check if all the prime factors of each number are also prime factors of 396.
The prime factorization of 88 is 2³ × 11. Both 2 and 11 are factors of 396, so 88 is a factor of 396.
The prime factorization of 121 is 11². 11 is a factor of 396, but there is no factor of 121 that matches the remaining prime factors of 396 (2² × 3¹), so 121 is not a factor of 396.
The prime factorization of 9 is 3². Both 3 and 2 are factors of 396, so 9 is a factor of 396.
The prime factorization of 14 is 2 × 7. 7 is not a factor of 396, so 14 is not a factor of 396.
The prime factorization of 22 is 2 × 11. Both 2 and 11 are factors of 396, so 22 is a factor of 396.
Therefore, the two numbers that are factors of 396 are 88 and 9.