a, \(\sqrt{27.98}=\sqrt{3^3.49.2}=21\sqrt{6}\)
b, \(\sqrt{125.96}=\sqrt{5^3.4^2.6}=20\sqrt{30}\)
c, \(\sqrt{500.162}=\sqrt{10^2.5.9^2.2}=90\sqrt{10}\)
d, \(\sqrt{a^4b^5}=a^2b^2\sqrt{b}\)
a) \(21\sqrt{6}\)
b) \(20\sqrt{30}\)
c) \(90\sqrt{10}\)
d) \(a^2b^2\sqrt{b}\)