There is no real number whose square root can be negative so there is no real solution. So mathematicians invented the imaginary number i with the property that i*i = -1
i is fundamental to complex numbers.
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1 +/- the square root of 3
The two numbers are (1/2)(7 - i root(71)) and (1/2)(7 + i root(71)).Note that this problem has no solution in the real numbers, only the complex solution listed above.
203 = 8000, so the first digit is 2, and the second digit must be 1 (because only 13 =1). So the cube root of 9261 is 21.
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