Question

Multiply.
(√(5)+4√(6))(5-4√(6))

Answer 1

-57.7387676 ?

Answer 2

i was having a doubt.

Answer 3

-91

Answer 4

still.

Answer 5

I think it has to be the exact answers and u can use a radicals too

Answer 6

you are right saifoo, something is wrong

Answer 7

hmm, it is.

Answer 8

it's a differnence of tqo squared

Answer 9

take it to its original

Answer 10

I got 5√5-4√30+20√6-96... idk if it right

Answer 11

http://www.youtube.com/watch?v=dx96ousAW4o&feature=featured

Answer 12

maybe
\[-96+5 \sqrt{5}+20 \sqrt{6}-4 \sqrt{30}\]
you have it exactly

Answer 13

so mines would be the correct answer?

Answer 14

yes.

Answer 15

Is it really \[\large \left( \sqrt {5}+4\,\sqrt {6} \right) \left( \sqrt {5}-4\,\sqrt {6}
\right)\] ???

Answer 16

yes your answer is correct! good work

Answer 17

there is a mistyping then

Answer 18

for the given data the answer will be -57.7387676