math (Matrix) 2
posted by MARYSE on .
if (2 1 x+2 )
(3 x4 5 ) =25
(0 1 3 )
a) find the value of x
b) hence ,find (2 1 x+2 )^1
( 3 x4 5 )
(o 1 3 )
p/s : all the value above IS COMBINE in one bracket ( )

solve the equations by using
a) the adjoint matrix
b) elementary row operations
i) x+y+z=6
2xy+z=3
x+4yz=6
ii) 3p3q+r=1
3p+5q2r=1
p2q+r=3
iii)12a+b+17c=14
2ab+3c=5
8a+b13c=3
thanks sir/madam