\(-3\sqrt{7}va-9\)
bình phương ta có
\(-\left(3\sqrt{7}\right)^2=-63\) \(-\left(9\right)^2=-81\)
mà -63>-81 suy ra \(-3\sqrt{7}< -9\)
so sanh 3+\(2\sqrt{2}\)va 7-\(\sqrt{3}\)
SO SANH -4/3 VA 9/-7
\(\sqrt{24}+\sqrt{63}+3\)va 16 .so sanh
so sanh :\(\sqrt{1999}+\sqrt{2001}..va..2\sqrt{2000}\)
So sanh: x=\(\sqrt{2019}\)va y=\(2\sqrt{2018}-\sqrt{2017}\)
so sanh 10\(\sqrt{51}\)va 70+\(\sqrt{2}\)
so sanh : A=\(\sqrt{11+\sqrt{96}}\) va B=\(\frac{2\sqrt{2}}{1+\sqrt{2}-\sqrt{3}}\)
so sanh \(\sqrt{2006}+\sqrt{2008}\) va \(2\sqrt{2007}\)
so sanh
2√5 - 5 va √5 -3
√17 + √26 va 9
√48 va 13√35