Square Root of 756 Simplified

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What is the square root of 756 simplified?

Answer

√756 = 6√21

756 = 36 × 21, and 36 = 6² is the largest perfect square that divides 756, so √756 = √36 × √21 = 6√21. Check: 6√21 ≈ 27.495, the same as √756 ≈ 27.495.

Simplifying √756 Step by Step

1. Prime factorization. — All Prime Factors of 756:

756 = 2 × 2 × 3 × 3 × 3 × 7 = 22 × 33 × 7

2. Pair up equal primes. Each pair is a perfect square and comes out of the root as one factor; a prime without a partner stays under the radical.

Prime factorTimes in 756Comes out of the rootStays under the root
222—
3333
71—7

3. Take the pairs out of the root.

√756 = √((2 × 2) × (3 × 3) × 3 × 7)

= 2 × 3 × √(3 × 7)

= 6√21

4. Check by squaring back.

6² × 21 = 36 × 21 = 756

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This calculator writes a square root in simplest radical form: it finds the largest perfect square that divides the number, takes its root out of the radical and leaves the rest under it. For example, it can help you find out what is the square root of 756 simplified? (The answer is: 6√21). Enter a whole number (e.g. '756') and hit the 'Simplify' button.
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Simplified Square Roots Table

NumberSimplest radical formDecimal value
4804√30≈ 21.909
4953√55≈ 22.249
50010√5≈ 22.361
50713√3≈ 22.517
514√514≈ 22.672
5255√21≈ 22.913
5284√33≈ 22.978
5505√22≈ 23.452
60010√6≈ 24.495
67515√3≈ 25.981
72012√5≈ 26.833
7255√29≈ 26.926
72611√6≈ 26.944
7292727
7505√30≈ 27.386
7566√21≈ 27.495
7722√193≈ 27.785
7802√195≈ 27.928
80020√2≈ 28.284
8505√34≈ 29.155
8755√35≈ 29.58
8804√55≈ 29.665
9608√15≈ 30.984
97218√3≈ 31.177
1,00010√10≈ 31.623
1,20020√3≈ 34.641
1,25025√2≈ 35.355
1,2606√35≈ 35.496
1,28016√5≈ 35.777
1,2963636

FAQ

What is the square root of 756 simplified?

√756 = 6√21

Is 756 a perfect square?

No. 756 = 36 × 21: its largest perfect square factor is 36 = 6², and the factor 21 stays under the radical, so √756 = 6√21.

What is √756 as a decimal?

√756 ≈ 27.495. The decimal never ends and never repeats, so it is always rounded; the exact value is 6√21.

What is the largest perfect square that divides 756?

36 = 6². Dividing gives 756 ÷ 36 = 21, and 21 has no square factor left, so √756 = √36 × √21 = 6√21.

See Also