W wjweaver New member Joined Sep 22, 2011 Messages 1 Sep 22, 2011 #1 √-8√-24 -8-8i 1+2i got this far with it (-8-8i)(1-2i) (1+2i)(1-2i) usedfoil method = -8+16i -8i +16i2 12-4i2 need help:sad:
√-8√-24 -8-8i 1+2i got this far with it (-8-8i)(1-2i) (1+2i)(1-2i) usedfoil method = -8+16i -8i +16i2 12-4i2 need help:sad:
tkhunny Moderator Staff member Joined Apr 12, 2005 Messages 11,325 Sep 22, 2011 #2 i^2 = -1 -- Substitute 16i - 8i = 8i -- This is simpler.
L lookagain Elite Member Joined Aug 22, 2010 Messages 3,250 Sep 24, 2011 #3 Post Deleted Post Deleted Last edited: Sep 24, 2011
