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OpenStudy (anonymous):
what should I do to prove that if A is a symetric matrix than 2*A^2-3*A+I (unit matrix) is symetric too please please is urgent i have to do this @Mathematics
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OpenStudy (anonymous):
\[[2A ^{2}-3A+I]^{T} = 2({A ^{T}})^{2} - 3A ^{T} +I ^{T} = 2A ^{2}-3A+I\]
OpenStudy (anonymous):
thank you
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