Question

ПОМОГИТЕ СРОЧНО
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Answer 1

$\frac{11}{5- \sqrt{14} } - \frac{2}{4- \sqrt{14} } = \frac{11(5+ \sqrt{14})}{(5- \sqrt{14})(5+ \sqrt{14}) } - \frac{2(4+ \sqrt{14})}{(4- \sqrt{14})(4+ \sqrt{14}) } = \\ \\ = \frac{11(5+ \sqrt{14})}{25-14 } - \frac{2(4+ \sqrt{14})}{16-14 }=\frac{11(5+ \sqrt{14})}{11 } - \frac{2(4+ \sqrt{14})}{2 }= \\ \\ =5+ \sqrt{14}-(4+ \sqrt{14} )= 5+ \sqrt{14}-4- \sqrt{14} = 5-4=1$