Question

$frac{7-3sqrt{2}}{7+3sqrt{2}}+frac{7+3sqrt{2}}{7-3sqrt{2}}$

Answer 1

$frac{7-3 sqrt{2} }{7+3 sqrt{2} } + frac{7+3 sqrt{2} }{7-3 sqrt{2} } = frac{(7-3 sqrt{2})^2 }{7^2- (sqrt{18})^2 } + frac{(7+3 sqrt{2})^2 }{7^2- (sqrt{18})^2 } = frac{49-14 sqrt{18}+18+49+14 sqrt{18+18} }{49-18} = frac{134}{31} =4 frac{10}{31}$

Answer 2

Матов переведи неправильный дроб=) на 4 10/34