A-Level Further Maths: C5-05 Determinants: Proving det(kA)=k^2det(A) for 2x2 Matrices

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now I don't think I'll forget this property, thanks

imbabywild
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a geometric way of looking at this problem is that kA means that the linear transformation due to A is scaled k times hence area is scaled k^2 times i.e. k^2*detA

adikar
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Wow very helpful video, thank you very much

robertesterhuizen