Question

ok, here's another on lol. (sqrt5 + 1)(7sqrt5 + 1).
i got 15sqrt5 + 1 as my answer, is this correct?

Answer 1

\[36+8\sqrt{5}\]

Answer 2

that's the answer!!

Answer 3

Did you used FOIL?

Answer 4

i thought i did lol

Answer 5

when i did FOIL, i got 7sqrt5 + sqrt5 + 7sqrt5 + 1

Answer 6

\[\Large 7\sqrt{5} \times \sqrt{5} = 35\]

Answer 7

i didn't multiply within the sqrt.......... o.O *smacking head*

Answer 8

lol.

Answer 9

now i have 36 + 8sqrt5 lol. i have one last problem lol

Answer 10

lol.