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Mathematics 7 Online
OpenStudy (butterflydreamer):

Matrix Question attached below. Please help :)) http://prntscr.com/adff6h

OpenStudy (butterflydreamer):

I'm not too familiar with how to find A^(-1) for a 3x3 matrix.

OpenStudy (rsadhvika):

\[A^3 = 3A-2I\] Multiply \(A^{-1}\) through out and get \[A^2 =3I - 2A^{-1}\] You can isolate \(A^{-1}\) from above

OpenStudy (butterflydreamer):

oh... haha, i can't believe that i totally missed that! Thank you so much :)

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