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The term principal square root refers only to square roots of positive numbers. The square root of a negative number is imaginary, and is denoted by the square root of its absolute value, succeeded by the letter i, denoting its imaginary status. In this instance, sqrt(-88.36) = 9.4 i, such that sqrt(88.36) = 9.4.

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Q: What is the principle square root of -88.36?

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The square root of 8836 is 94.

The principal square root is 100.

The square root of 121 is 11

9

12

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The square root of 8836 is 94.

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The principal square root is 100.

The principle square root of 64 is ±8.8.* * * * *The square roots of 64 are +8 and -8.The PRINCIPAL square root is the positive root, +8.So, the answer to the question that was asked is +8 not ±8.

The square root of 225 is 15

The square root of 121 is 11

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The square root of a positive real number can either be +/-. The principle square root is defined as the positive value. sqrt(9) is +/- 3, but the principle square root of 9 is 3. For complex numbers the principle square root is the argument (or angle) of the complex number that lies between (-pi,pi]. I am pretty sure that the upper angle pi is closed while the lower angle -pi is open, but not 100%.

The second root would be the negative of the principal root.

(√(a))²=a The square root and the square cancel to leave just 49/21■