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explain why ³√-64 is real but √-64 is not
Solution
3√(-64) = -4, since (-4)3 = -64 If x = √(-64), then x2 = -64. If x is real, then x2≥0. So, the equation x2 = -64 has no real solutions.
explain why ³√-64 is real but √-64 is not
Solution
3√(-64) = -4, since (-4)3 = -64 If x = √(-64), then x2 = -64. If x is real, then x2≥0. So, the equation x2 = -64 has no real solutions.