(9-sqrt{2})(6+sqrt{2}) is the answer 15sqrt{2}?

Question

(9-sqrt{2})(6+sqrt{2})  is the answer 15sqrt{2}?

anonymous · Answer

you gotta multipy this out

anonymous · Answer

$$(9-\sqrt{2})(6+\sqrt{2})$$ do i use the foil method?

anonymous · Answer

yes

anonymous · Answer

ok i dont think this is right but here it is $$54+9\sqrt{2}-6\sqrt{2}-\sqrt{2}$$

anonymous · Answer

everything is right, excpect for the last part, its not sqrt(2), its just 2

anonymous · Answer

now do i collect the like terms and it will be$$54+\sqrt{2}-\sqrt{2}$$ so will the answer be 54?

anonymous · Answer

56?

anonymous · Answer

no, it would be 54+3sqrt(2)-2=56+3sqrt(2)

anonymous · Answer

ok so the final answer would be $$56+3\sqrt{2}$$

anonymous · Answer

yup

anonymous · Answer

well i got 1% of it right lol

anonymous · Answer

you mean its wrong?

anonymous · Answer

oh i ment i just got the 56 right well no i got that wrong too so i didnt get much of it right

anonymous · Answer

sorry 52+3sqrt(2)

anonymous · Answer

come on you have to checking a well, dont just trust people on here, we make mistakes

anonymous · Answer

well thats why i ask to check my work cause when i do it i get different answers, and i dont ask to have the answers just told to me cause i still wont know how to work it,

anonymous · Answer

okay

anonymous · Answer

thats why i ask if the steps im doing is right

anonymous · Answer

but 9*6=54 how is it 52? did you subtract the 2