document.write( "Question 991823: Find the inverse of the matrix [3 -1] it's a 2 by 2.
\n" ); document.write( " [-10 9] \n" ); document.write( "

Algebra.Com's Answer #611585 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
The inverse of a 2x2 matrix,
\n" ); document.write( " $\"A=%28matrix%282%2C2%2Ca%2Cb%2Cc%2Cd%29%29\"$ is equal to the determinant,
\n" ); document.write( " $\"D=1%2F%28ad-bc%29\"$ multiplied by the matrix
\n" ); document.write( " $\"M=%28matrix%282%2C2%2Cd%2C-b%2C-c%2Ca%29%29\"$
\n" ); document.write( "Just substitute the values.
\n" ); document.write( " $\"A%5E%28-1%29=D%2AM\"$
\n" ); document.write( " \n" ); document.write( "

\n" );