Question

помогите очень срочно

Answer 1

$1.7 - 4 sqrt{7} + 4 - ( sqrt{7} - 3)( sqrt{7} + 3) + 4 sqrt{7} \ 7 + 4 - (7 - 9) \ 7 + 4 - ( - 2) \ 7 + 4 + 2 = 13 \ frac{6}{ sqrt{3} } = frac{6 sqrt{3} }{ sqrt{3} sqrt{3} } = frac{6 sqrt{3} }{3} = 2 sqrt{3} \ 2. sqrt{2} x = 2 sqrt{2} - 3 sqrt{2} \ sqrt{2} x = - sqrt{2} \ x = - 1 \ 3.5 sqrt{3} = sqrt{5 {}^{2} times 3} = sqrt{25 times 3} = sqrt{75} \ - 2 sqrt{13} = sqrt{ - 2 {}^{2} times 13} = sqrt{4 times 13} = sqrt{52}$