Posted by jason silverman on Wednesday, January 2, 2008 at 4:51pm.
I will do the first one and the last one, you do the rest.
sqrt 72 + sqrt 18
=
sqrt (18*4) + sqrt 18
=
2 sqrt 18 + 1 sqrt 18
=
3 sqrt (3*3*2)
=
9 sqrt 2
-----------------------------
(2+sqrt 3) (4+sqrt3)
/
(4-sqrt 3) (4+sqrt3)
=
(8 +6sqrt 3 + 3 )
/
(16-3)
=
(11 +6 sqrt 3)
/
13
is there a way that the 1/3sqrt18 x sqrt16 problem can be solved
150 / 3
and
6
sqrt7 + 2
i'm having trouble with those.
If you mean (1/3)sqrt18 x sqrt16, that is (1/3)sqrt(9*2)* 4 = 4 sqrt 2
Surely you know what 150/3 is.
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