Asked by George

Perform the indicated operation and the write the result in standard form

(6+ sq root -5)(6 + sq root -7)=
Answered by anonymous
(1 + square root)(-1 + square root)
is the answer 0? don't they cancel out?
could you help with my algebra question?
Answered by bobpursley
Do this with FOIL. I will be happy to check your work.
Answered by George
okay I got 1-12 sq root of 35i is this correct
Answered by bobpursley
6*6 + 6isqrt7 +5i*sqrt5+ i*sqrt35

I don't see how you can get less than four terms.
Answered by George
Well that isnt one of my answers the question is multiple choice another choice is (36 - sq rt 35) + (6 sqrt 7 + 6 sqrt 5)i

Answered by Reiny
Other than a small typo, bobpursley is right
He meant to say:

6*6 + 6isqrt7 +5i*sqrt5+ i^2*sqrt35
= 36 + 6i√7 + 5i√5 - √35

George, trust us, we are right according to the way you typed the question!
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