Question

Решите пжжж!!!!!!!!!!

Answer 1

1) =7
$(8 sqrt{63} - 3 sqrt{28} - 5 sqrt{112} ) div 2 sqrt{7} = - 2 sqrt{7} div 2 sqrt{7} = 7$
2)
$(15 sqrt{1.2} + frac{1}{3} sqrt{270} - 2 sqrt{30} = 4 sqrt{30} - 2 sqrt{30} = 2 sqrt{30}$