What is the exact value for the expression √(53) - √(13) +√(117) ? Simplify if possible.

A. 4√13
B. √13
C. 2√39
D. 8√39

I keep doing it and each time I somehow end up getting 2√13 someone please help

Question

What is the exact value for the expression √(53) - √(13) +√(117) ? Simplify if possible.

A. 4√13
B. √13
C. 2√39
D. 8√39

I keep doing it and each time I somehow end up getting 2√13 someone please help

akashdeepdeb · Answer

Tag some people! :)

akashdeepdeb · Answer

@amistre64

amistre64 · Answer

how many 13s are in 53?  how many 13s are in 117?

amistre64 · Answer

lol, the options dont make sense to me.  13 is prime and therefore has no perfect roots to remove

maybe try to conform them to 39?

akashdeepdeb · Answer

But how to get that 53 out of the way?

amistre64 · Answer

you cant get 53 out of the way ... which is why the options are senseless. check for typing errors in your post http://www.wolframalpha.com/input/?i=sqrt%2853%29-sqrt%2813%29%2Bsqrt%28117%29

amistre64 · Answer

4sqrt13 is the closest in value :)

amistre64 · Answer

yeah, the wolf is awesome ... finicky at times, but pretty awesome