What is the correct prime factorization (expansion) for 162−−−√

?(1 point)
Responses

2×2×3×3×3
2 times 2 times 3 times 3 times 3

2×3×3×3×3
2 times 3 times 3 times 3 times 3

2×2×2×3×3
2 times 2 times 2 times 3 times 3

2×2×2×2×3

1 answer

To find the prime factorization of \(\sqrt{162}\), we first need to factor 162 into its prime factors.

  1. Divide 162 by 2: \[ 162 \div 2 = 81 \] So, \(162 = 2 \times 81\).

  2. Now, factor 81: \[ 81 = 3 \times 27 \] And, \(27 = 3 \times 9\) and \(9 = 3 \times 3\). Therefore, \(81 = 3 \times 3 \times 3 \times 3 = 3^4\).

So, the complete prime factorization of 162 is: \[ 162 = 2 \times 3^4 \]

Now, we need to find the square root: \[ \sqrt{162} = \sqrt{2 \times 3^4} = \sqrt{2} \times \sqrt{3^4} = \sqrt{2} \times 3^2 = 3\sqrt{2} \times 9 \]

However, the question refers to the prime factorization, which we have found to be \(2 \times 3^4\).

If we expand \(3^4\): \[ 3^4 = 3 \times 3 \times 3 \times 3 \]

Now combining it with \(2\): \[ 162 = 2 \times 3 \times 3 \times 3 \times 3 \]

This can also be expressed as: \[ 2 \times 3 \times 3 \times 3 \times 3 \]

So looking through the given responses:

  • The response 2×3×3×3×3 corresponds to the prime factorization of \(162\).

Hence, the correct response is: 2 times 3 times 3 times 3 times 3.