Question

√5(2√45-√5)

Answer 1

this one is unambiguous

= √5(2*3√5 - √5)
= 30 - 5 = 25

Answer 2

note √45 = √9 * √5 = 3√5

Answer 3

So which one is the answer?

Answer 4

Can someone answer that one?

Answer 5

the answer is 25
in my last post i was explaining how i simplified √45

Answer 6

Ok so I just put 25 for that answer?

Answer 7

yes
as you have a radical expression in bottom of fraction (1 - √3) you rationalise it by multiplying top and bottom by 1 + √3
= 7 (1 + √3) 7 (1 + √3)
------------- = ------
(1 + √3)(1 - √3) -2

Answer 8

Your answer doesn't match any of the choices can I draw them out for you so you can tell me which one is right?

Answer 9

ok