Please tell me what I am doing wrong from this example? Warning about to prob see crazy dumbness ahead:
(1-i/1+j)^2
= 1-2j-j^2/1+2j+j^2
=2-2j/2j <--not right!
should be - 1 is the answers. Whats my problem? how do i get rid of that +2?
(1-i/1+j)^2
= 1-2j-j^2/1+2j+j^2
=2-2j/2j <--not right!
should be - 1 is the answers. Whats my problem? how do i get rid of that +2?
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You wrote (-j)^2 = as -j^2 in the Nr. which is wrong.
(x-y)^2 = x^2 - 2xy +y^2 not x^2 -2xy -y^2.
(x-y)^2 = x^2 - 2xy +y^2 not x^2 -2xy -y^2.
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I'm don't have any paper around... but here's a nifty website that will show you how to do it.
Just type the problem into it
http://www.wolframalpha.com/
Just type the problem into it
http://www.wolframalpha.com/