How do you solve #x + y = 5 # and #3x – y = –1# using matrices?
1 Answer
Jul 16, 2018
Explanation:
Here,
Let us write in the matrix equation form :
We take ,
#:.AX=B#
Now,
Now ,
#:.A^-1=1/(detA)*adjA#
#:.A^-1=-1/4((-1,-1),(-3,1))#
We have,
#=>X=-1/4((-1,-1),(-3,1))((5),(-1))#
Using Product of two matrices :
#X=-1/4((-5+1),(-15-1))#