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[tex]4 \sqrt{3}- \frac{1}{( \sqrt{7}- \sqrt[4]{48})*( \sqrt{7}+ \sqrt[4]{48}) } [/tex]
[tex]4 \sqrt{3}- \frac{1}{( \sqrt{7}- \sqrt[4]{48})*( \sqrt{7}+ \sqrt[4]{48}) } [/tex]
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= 4√3 - 1 / (√7)²-(⁴√48)² = 4√3 - 1 / 7-√(16*3) = 4√3 - 1 / 7-4√3 == 4√3(7-4√3)-1 / 7-4√3 = 28√3-(4√3)²-1 / 7-4√3 = 28√3-48-1 / 7-4√3 =
= 28√3-49 / 7-4√3 = 7(4√3-7) / 7-4√3 = -7