Question

Answer 1

\(=\sqrt{25.2}-3\sqrt{4.2}+\sqrt{16.2}\\ =5\sqrt{2}-6\sqrt{2}+4\sqrt{2}\\ =3\sqrt{2}\)

Answer 2

=5 căn 2-6 căn 2+4 căn 2=3 căn 2

Answer 3

=√25.2−3√4.2+√16.2

=5√2−6√2+4√2

=3√2