Question

Срочно решите!!!!!!!

Answer 1

$(7 \sqrt{2} + 3 \sqrt{5} ) \sqrt{2} - 3 \sqrt{10} = 7 \sqrt{2} \sqrt{2} + 3 \sqrt{5} \sqrt{2} - 3 \sqrt{10} = 7( \sqrt{2} ) {}^{2} + 3 \sqrt{2 \times 5} - 3 \sqrt{10} = 7 \times 2 + 3 \sqrt{10} - 3 \sqrt{10} = 14$

Ответ: 14