(2 - the square root of 5)(4 + the square root of 5)
someone please help!!!

Question

(2 - the square root of 5)(4 + the square root of 5) 
someone please help!!!

skullpatrol · Answer

Any ideas?

anonymous · Answer

honestly no. i suck at square roots, well really only when they are in equations. so to answer you question, no. i am useless:)

anonymous · Answer

wait, won't the answer end in the square root of 5 since they both end in that?

skullpatrol · Answer

$$(2-\sqrt5)(4+\sqrt5)$$ Let a=2,$$b=\sqrt5$$and c=4

anonymous · Answer

okay

skullpatrol · Answer

(a -b)(c + b) now use FOIL

anonymous · Answer

ac+ab+bc+bsquared?

skullpatrol · Answer

-bc

anonymous · Answer

ohhh yeah sorry missed the negative.

skullpatrol · Answer

-b^2

anonymous · Answer

okay i may sound really dumb right now but whats with the little triangle?

skullpatrol · Answer

It is the symbol for "raised to" -b^2$$-b^2$$

anonymous · Answer

otay

anonymous · Answer

ummm.. alright so i know that youre teaching me and whatnot but i have no idea what to do next

skullpatrol · Answer

$$ac+ab-bc-b^2$$

anonymous · Answer

okay well i just did some research and guess who foung her answer. this chick!!! the answer will eventually be 3-2the square root of 5

anonymous · Answer

well thank you bunches. may you live well and be prosperous.. oh wait thats weird.. thats star trek... well anyways thank you:)

skullpatrol · Answer

Thanks for trying...