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April 18, 2014

Homework Help: Roots and Pre-cal

Posted by raven 31791 on Wednesday, March 7, 2007 at 11:44am.

Find the roots of the function
f(x)= x^2 +2x+2

a)-1 + sq root of 2 and -1 - sq root of 2

b) -1 + i and -1 - i

c)-1 -2i sq root of 2 and -1-2i sq root of 2

d)-1 +2i and -1-2i

The i's are in italics but I can't .make them in italic here for some reason



completing the square:
x^2+2x +1= -2 +1
(x+1)^2=-1
x+1= +-i sqrt2

solve for x

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