Question

Tìm:

a, \(\sqrt{9}\)

b, \(\sqrt{\frac{121}{484}}\times\sqrt{1024}\)

c, \(\sqrt{6,25}\)

d, \(\sqrt{7\frac{21}{25}}\)

e, y, biết: \(y^2=1296\)

Answer 1

a) \(\sqrt{9}=3\)

b) \(\sqrt{\frac{121}{484}}\times\sqrt{1024}=\frac{1}{2}\times32=16\)

c) \(\sqrt{6,25}=2,5\)

d) \(\sqrt{7\frac{21}{25}}=\sqrt{\frac{196}{25}}=\frac{14}{5}=2,8\)

e) \(y=\sqrt{1296};y=-\sqrt{1296}\)

<=> \(y=36\) hoặc \(y=-36\)

Answer 2

a)\(\sqrt{9}=3\)

b)\(\sqrt{\frac{121}{484}}\times\sqrt{1024}=\frac{11}{22}\times32=16\)

c)\(\sqrt{6,25}=2,5\)

d)\(\sqrt{7\frac{21}{25}}=\sqrt{\frac{196}{25}}=\frac{14}{5}\)

e)y²=1296

y=\(\sqrt{1296}\)

y=36

Answer 3

chết tui thiếu phần e là ±36