1.

Compute the following: [[a,b],[-b,a]][[a,-b],[b,a]]

Answer»

SOLUTION :`[[a,B],[-b,a]], [[a,-b],[b,a]]=[[a^2+b^2, -ab+ab],[-ab+ab, b^2+a^2]]=[[a^2+b^2, 0],[0, a^2+b^2]]`


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