Question 1183891
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You should  COLLECT  (re-grpup)  three imaginary terms   i*sqrt(2)   in one group 


and three other terms of real numbers in other group,  and then combine like terms in each group.



By doing so,  you should carefully operate with the signs of these terms.



Your final answer should be complex number of the form    a + ib*sqrt(2),

where   " a "   and   " b "   are real numbers  (coefficients).



Do you understand my instruction in full ?



Let me know, if my instructions were sufficient for you.


If you still have questions, do not hesitate to ask.