229
edits
Changes
Jump to navigation
Jump to search
Line 4:
Line 4: − +
Undo revision 125313 by Special:Contributions/RSchlafly (User talk:RSchlafly)
==Two square roots ==
==Two square roots ==
All numbers other than zero have two square roots that differ by a factor of -1:
All numbers other than zero and negative numbers have two square roots that differ by a factor of -1:
:<math>3 \cdot 3 = 9</math> and <math>-3 \cdot -3 = 9</math>
:<math>3 \cdot 3 = 9</math> and <math>-3 \cdot -3 = 9</math>