Question

what is sqrt(7+4sqrt3)+sqrt(7-4sqrt3)?thnx!

Answer 1

do you want to find the numerical value of this?

Answer 2

yes pls. and the solution on how to get it?

Answer 3

u can of couse do this with a calculator

Answer 4

but our teacher did not allow us to use calculatro

Answer 5

i cant see a way to simplify it i'm afraid
of course i could be wrong

Answer 6

oh ok. thnx anyway!:-)))

Answer 7

sorry i couldn't help

Answer 8

well its ok! thnx!

Answer 9

yw

Answer 10

You can use this identity

\[(a+b)(a-b) = a^2 - b^2\]

So we get
\[(7+4\sqrt{3})(7-4\sqrt{3}) = 7^2- (4\sqrt{3})^2\]

\[49- 16(3) =49-48=1\]

Answer 11

@rnpua , hope this is what you were looking for :)

Answer 12

right - i missed that one!!

Answer 13

yeah, i tried that, but i realized it was addition, not multiplication though.haha.but thnx
@shivam_bhalla!