Solved on Jan 13, 2024

Find the square root of 784 using prime factorization.

STEP 1

Assumptions
1. We need to find the square root of 784.
2. We will use prime factorization to find the square root.

STEP 2

Begin the prime factorization of 784 by finding the smallest prime number that divides 784.
784÷2=392784 \div 2 = 392

STEP 3

Continue the prime factorization with the quotient.
392÷2=196392 \div 2 = 196

STEP 4

Continue the prime factorization.
196÷2=98196 \div 2 = 98

STEP 5

Continue the prime factorization.
98÷2=4998 \div 2 = 49

STEP 6

Since 49 is not divisible by 2, we find the next smallest prime number, which is 7.
49÷7=749 \div 7 = 7

STEP 7

Continue the prime factorization.
7÷7=17 \div 7 = 1

STEP 8

Now that we have reached 1, we can stop the prime factorization. The prime factors of 784 are:
784=2×2×2×2×7×7784 = 2 \times 2 \times 2 \times 2 \times 7 \times 7

STEP 9

To find the square root, we pair the prime factors into pairs of identical factors.
784=2×2×2×2×7×7\sqrt{784} = \sqrt{2 \times 2 \times 2 \times 2 \times 7 \times 7}

STEP 10

Take one factor from each pair out of the square root.
784=2×2×7\sqrt{784} = 2 \times 2 \times 7

STEP 11

Multiply the factors outside the square root to find the square root of 784.
784=2×2×7=4×7=28\sqrt{784} = 2 \times 2 \times 7 = 4 \times 7 = 28
The square root of 784 is 28.

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