1. Tính:
a, \(\sqrt{50.98}\) b, \(\sqrt{2,5.12,1}\) c, \(\sqrt{17.51.27}\)
d, \(\sqrt{32.128}\) e, \(\sqrt{3,2.7,2.49}\) g, \(\sqrt{2,5.12,5.20}\)
2. Tính:
a, \(\sqrt{1,8}.\sqrt{0,2}\) ; b, \(\sqrt{500}.\sqrt{3,2}\) ; c, \(\sqrt{500}.\sqrt{1,25}\) ; d, \(\sqrt{1,5}.\sqrt{\dfrac{2}{3}}\)
3. Tìm số x không âm , biết:
a, \(\sqrt{4x}=8\) ; b, \(\sqrt{0,7x}=6\) ; c, 9 - 4 \(\sqrt{x}=1\) ; d, \(\sqrt{5x}< 6\)
e cần gấp lắm ạ mọi người giúp em
Câu 1:
a, \(\sqrt{50.98} = 5\sqrt{2} . 7\sqrt{2} = 70\)
b, \(\sqrt{2,5.12,1} = 30,25\)
c, \(\sqrt{17.51.27} = \sqrt{23409} = 153\)
d, \(\sqrt{32.128} = \sqrt{4096} = 64\)
e, \(\sqrt{3,2.7,2.49} = 7\sqrt{3,2.7,2} = 7\sqrt{23,04} =33,6\)
g, \(\sqrt{2,5.12,5.20} = \sqrt{625} = 25\)