Question

номер346 пункты 1256

Answer 1

$2+ sqrt{2} = sqrt{2} * sqrt{2} + sqrt{2} = sqrt{2} *( sqrt{2} +1)$
$sqrt{a} + a = sqrt{a} + sqrt{a} * sqrt{a} = sqrt{a} * ( sqrt{a} +1)$
$sqrt{2a} + sqrt{5a} = ( sqrt{2a} + sqrt{5a} ) * ( sqrt{2a} + sqrt{5a} )$
$sqrt{28} + sqrt{32} = sqrt{4*7} + sqrt{4*8} = 2* sqrt{7} + 2* sqrt{8} = 2* ( sqrt{7} + sqrt{8} )$