Question

помогите с алгеброй пж

Answer 1

1.
$11 sqrt{5} + 10 sqrt{5} - 6 sqrt{5} = 15 sqrt{5}$
2.
$3 times 5 times 2 - 3 times sqrt{64} = \ 30 - 3 times 8 = 6$
3.
$6 + 2 sqrt{6 times 3} + 3 = 9 + 2 sqrt{18} = \ 9 + 2 times 3 sqrt{2} = 9 + 6 sqrt{2}$
4.
${ sqrt{3} }^{2} - { sqrt{8} }^{2} = 3 - 8 = - 5$
5.
$frac{ sqrt{7}( sqrt{7} + 1) }{5 sqrt{7} } = frac{ sqrt{7} + 1}{5}$
7.
$sqrt{9 + 2 times 3 times sqrt{3} + 3} = \ sqrt{ {(3 + sqrt{3}) }^{2} } = 3 + sqrt{3}$