-1^2
−12=−1∗−1=1.
Hi, tertre!
−12=−1.
This confuses most people, and this is a quite common error. I would like to correct it once and for all!
−12=−(12)=−(1∗1)=−1(−1)2=−1∗−1=1
Do you see the difference? The order of operations is strict.
Xsquared's answer is the correct one.
You do need to bew careful though.
1)−12=−1∗12=−1∗1=−1 2)(−1)2=−1∗−1=+1=1 3)Ifx=−1thenx2=(−1)2=+1 4)x2=1findx→x=±√1=±1
+2446 
