Factorize. a^4-a^2+2a-1​

Multiplying an even number of negative numbers gives an answer that is choose from:

Ray ce is the angle bisector of zacd, which statement about the figure must be true? mzecd-mzecb mzace « 4mzacd zace - zdcb zecd zacd save and exit

Asinusoidal function whose frequency is 1/6pi