No.
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if x is equal to the square root of 81 then x is ±9 (plus or minus 9)
Square root of 49 = 7... Square root of 9 = 3... 3 x 7 = 21
sqrt(4) = 2 sqrt(9) = 3 Therefore, the square root of 4 plus the square root of 9 is equal to 2 + 3 = 5.
To find the square root of a number you must find the number that can multiplied by itself to equal that number Ex: the square root of 9 is 3 because 3*3=9
No - a square root of a negative number is an imaginary number. for example, sqrt(-9) is equal to 3i.