Question

rút gọn

a) \(\left(-7\sqrt{7}\right)\left(-2\sqrt{8}\right)\)

b) \(-\sqrt{33}.3\sqrt{3}\)

c) \(\left(3\sqrt{5}\right).\left(-10\sqrt{3}\right)\)

d) \(\dfrac{1}{2}\sqrt{5}.\left(-6\sqrt{2}\right)\)

e) \(\dfrac{2}{3}\sqrt{7}.\left(-\dfrac{9}{16}\sqrt{3}\right)\)

f) \(15\sqrt{6}:5\sqrt{3}\)

g) \(-25\sqrt{12}:\left(-5\sqrt{6}\right)\)

h) \(36\sqrt{8}:12\sqrt{2}\)

i) \(4\sqrt{27}:\left(-2\sqrt{3}\right)\)

Answer 1

i: =-12*căn 3/2căn 3=-6

h: =72căn 2/12căn 2=6

g: =25căn 12/5căn 6=5căn 2

f: =(15:5)*căn 6:3=3căn 2

d: =-1/2*6*căn 10=-3căn 10