In this video the instructor shows how to find out the fourth roots of a number. The properties of fourth root says that for any positive number of a, its fourth roots are real. And for any negative value a, its fourth roots are not real. So split the number inside the fourth root as the product of two perfect squares and then cancel out the power with the fourth root giving its roots. As the fourth roots of a positive number are real, the answer you get is correct. But you cannot find out the fourth root of a negative number as it is not a real number and the answer will be a complex number. This is because you cannot multiply any number four times to itself and arrive at a positive result. This video shows how to find out the fourth roots of positive and negative numbers.
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