Question

Bài 1 . Tính a,\(\sqrt{\left(2-\sqrt{5}\right)^2-\sqrt{5}}\)
b, \(\sqrt{16}.\sqrt{25}+\sqrt{256.\sqrt{64}}\)
c, \(\sqrt{\left(2-\sqrt{3}\right)^2}-\sqrt{\left(5-\sqrt{2}\right)^2}\)

Answer 1

a. bấm máy tính nó nói max nặng

b.\(\sqrt{16}.\sqrt{25}+\sqrt{256.\sqrt{64}}\)

=\(\sqrt{4^2}.\sqrt{5^2}+\sqrt{16^2.8}\)

=/4/./5/+/16/./2/\(\sqrt{2}\)

=4.5+16.2\(\sqrt{2}\)

=20+32\(\sqrt{2}\)

c.\(\sqrt{\left(2-\sqrt{3}\right)^2}-\sqrt{\left(5-\sqrt{2}\right)^2}\)

=/\(2-\sqrt{3}\)/-/5\(-\sqrt{2}\)/

=\(2-\sqrt{3}-5-\sqrt{2}\)

=\(\left(2-5\right)-\left(\sqrt{3}-\sqrt{2}\right)\)

=\(-3-\sqrt{3}-\sqrt{2}\)

= -6,146