Question

c) 5√2 . 10√3 .(-5√7)=

d)2√3.4√11 . √13

e) 10√99 =
5 √9

f) 18√55
6√3

Answer 1

c) 5√2 . 10√3 .(-5√7)= 50√6 .(-5√7) = -250√42

d)2√3.4√11 . √13 = 8√429

e) $\frac{10 \sqrt{99} }{5 \sqrt{9} } = \frac{2 \sqrt{99} }{ \sqrt{9} } =2 \sqrt{ \frac{99}{9} } =2 \sqrt{11}$

f) $\frac{18 \sqrt{55} }{6 \sqrt{3} } = \frac{3 \sqrt{55} }{ \sqrt{3} } = \frac{ \sqrt{55.9} }{ \sqrt{3} } = \frac{ \sqrt{495} }{ \sqrt{3} }= \sqrt{ \frac{495}{3} } = \sqrt{165}$