Question

please help me >.<

1) 5 (11root) - 12 (11root) - 2(11root) =
2) (8 [6root] - [2root]) + (5 [6root] - 6 [2root]) =

Answer 1

# 1 is

\[\large 5\sqrt{11} - 12\sqrt{11} - 2\sqrt{11}\]

right?

Answer 2

yes exactly ! (:
the answer i got was -9\[\sqrt{33}\]

Answer 3

the -9 is correct, but the 33 is not

Answer 4

think of x = sqrt(11) to get

5x - 12x - 2x

combining all that gives you

5x - 12x - 2x = -9x

now replace x with sqrt(11) to get -9*sqrt(11)

Answer 5

-9 \[\sqrt{11}\]

Answer 6

oooh thank you !

Answer 7

yes exactly, yw

Answer 8

but for the second question that method wouldnt work??

Answer 9

think of x = sqrt(6) and y = sqrt(2)

Answer 10

does that help?

Answer 11

ummm.. alitle bit >.<

Answer 12

(8*sqrt(6) - sqrt(2)) + (5*sqrt(6) - 6*sqrt(2))

(8x - y) + (5x - 6y)

how about now?

Answer 13

so then i would be
(13x - 5y) ??

Answer 14

close

Answer 15

-y - 6y isn't -5y though

Answer 16

oooh -7y

Answer 17

so 13x - 7y

Answer 18

now replace x with sqrt(6) and replace y with sqrt(2)

Answer 19

i get it (: thank you soo much !!

Answer 20

you're welcome