2x-3y=19; X+4y =-7 solve using inverse matrix?
1 Answer
Jul 25, 2018
Explanation:
Here,
Let us write in the matrix equation form :
We take ,
#:.AX=B#
Now,
Now ,
#:.A^-1=1/(detA)*adjA#
#:.A^-1=1/11((4,3),(-1,2))#
We have,
#=>X=1/11((4,3),(-1,2))((19),(-7))#
Using Product of two matrices :
#X=1/11((76-21),(-19-14))#