Question

Упростите: (3√2 +2√7) · √2 - √56

Answer 1

 (3√2 +2√7) · √2 - √56 = 3√2*√2 + 2√7*√2 - 2√14 = 3*2 + 2√14 - 2√14 = 6

Answer 2

$(3 sqrt{2} +2 sqrt{7} ) sqrt{2} - sqrt{56} =3*2+2 sqrt{7*2} - sqrt{7*8} =\ 6+2 sqrt{7*2}-sqrt{7*4*2}=6+2 sqrt{7*2}-2sqrt{7*2}=6$