Every 2 by 2 symmetric matrix is AlxIxI + A2X2XI = AlP! + A2P2. Explain PI + P2 = xIxT +
Chapter 6, Problem 12(choose chapter or problem)
Every 2 by 2 symmetric matrix is AlxIxI + A2X2XI = AlP! + A2P2. Explain PI + P2 = xIxT + x2xI = I from columns times rows of Q. Why is PIP2 = O?
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