Return Styles: Pseud0ch, Terminal, Valhalla, NES, Geocities, Blue Moon. Entire thread

complex numbers

Name: Anonymous 2007-10-31 19:26

Find the roots of the equation (z+1)^3 = 1, in the form x+iy.

gogogo

Name: anon 2007-11-02 1:50

>>9
What did I do that was sneaky?  I expanded the parentheses (which I should have done with Pascal's Triangle instead of the Distributive Property), subtracted 1 from both sides, and factored out x from the expression containing it.  That left me with x*[quadratic], which made 0 one root by default.  Then, I used the Quadratic Formula to find the two roots of the remaining quadratic, and came up with -1.5 +/- i*sqrt(3/4) for the other two roots.  There's nothing hard about the problem.

Algebra II, I think?  In any case, it was a very straightforward and easy problem.

Newer Posts
Don't change these.
Name: Email:
Entire Thread Thread List