Question

Помогите пж алгебра

Answer 1

А) $5 \sqrt{2 } + 2 \sqrt{16 \times 2} - \sqrt{49 \times 2} = 5 \sqrt{2} + 8 \sqrt{2} - 7 \sqrt{2} = 6 \sqrt{2 }$
б)$(4 \sqrt{3} + \sqrt{27} ) \times \sqrt{3} = 4 \times 3 + \sqrt{27 \times 3} = 12 + 9 = 21 в)$
$5 - 2 \sqrt{15} + 3 = 8 - 2 \sqrt{15}$