- #1
karnten07
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Homework Statement
it is problem 1 on the attachment
Homework Equations
detA = ad - bc for a 2 x 2 matrix, where the first column is a c and the 2nd column is b d
The Attempt at a Solution
ah i see the first part i think, but I am nto sure I am writing my answer in the most correct way, say from first principles (not sure that is the correct eay to describe it). So when i multiply the 2 x 2 matrix by the scalar and work out the determinant by ad - bc, i get the scalar term squared times the determinant of A as the answer. therefore satisfying the first part.
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