Bài1 Tính
\(\sqrt{36}\) \(\sqrt{49}\) \(-\sqrt{49}\) \(\sqrt{\left(-0,02\right)^2}\) \(\sqrt{0,04}\) \(\sqrt{2500}\)
\(\sqrt{72}\) \(\sqrt{12}\) \(\sqrt{8}\) \(\sqrt{27}\) \(\sqrt{63}\) \(\sqrt{28}\) \(\sqrt{54}\) \(\sqrt{48}\) \(\sqrt{24}\)
Bài2 Tìm căn bậc hai của các số sau
3600 4900 10000 0,0001
\(\frac{64}{9}\) \(\frac{81}{25}\) \(\frac{16}{81}\) \(\frac{64}{25}\) \(\frac{100}{36}\) \(\frac{0,64}{81}\) \(\frac{36}{25}\) \(\frac{49}{16}\) \(\frac{121}{25}\) \(\frac{169}{196}\)
Bài 3Tìm x , biết
\(a,4x^2-1=0\) \(b,2x^2+0,82=1\)
\(c,7-\sqrt{x=0}\) \(d,\frac{5}{12}\sqrt{x-\frac{1}{6}}=\frac{1}{3}\) \(e,\sqrt{x+1-2=0}\)
\(f,x^2=81\) \(g,x-2\sqrt{x=0}\) \(h,x=\sqrt{x}\)
