Question

tinh va so sanh:

a:\(\sqrt{9\cdot4}\)va \(\sqrt{9}\cdot\sqrt{4}\)

b:\(\sqrt{169-144}\)va \(\sqrt{169}-\sqrt{144}\)

Answer 1

a)\(\sqrt{9.4}=\sqrt{36}=6;\sqrt{9}.\sqrt{4}=3.2=6\Rightarrow\sqrt{9.4}=\sqrt{9}.\sqrt{4}\)

b)\(\sqrt{169-144}=\sqrt{25}=5;\sqrt{169}-\sqrt{144}=13-12=1\Rightarrow\sqrt{169-144}>\sqrt{169}-\sqrt{144}\)

Answer 2

tra loi ho mik lun di mai ik hoc roi !chut chut chuit chut