The square root of 8 is an irrational number and so can only be represented by an infinitely long decimal expression. Rounded to 4 decimal places, it is 2.8284
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7.3484692283495345
±3i√6 Rounded to two decimal places, the square root of +54 is equal to ±7.35. Therefore, the square root of -54, rounded to two decimal places, is equal to ±7.35 i.
No, it is neither.
No - the square root of 40 is not a rational number. Rounded to ten decimal places, it is equal to 6.3245553203.
7.1