How do I solve this problem: 4(k to the 4/3 power) - 13(k to the 2/3 power) + 9 = 0?

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4 k^(4/3)+9 = 13 k^(2/3) or(k^(2/3)-1) (4 k^(2/3)-9) = 0k=1 and 27/8