Question

. If A=(3 4
7 9) and AB=I then B=?​

Answer 1

Answer:

Ax=Bý= Cx

A=(b)y/x and c= ( b)y/z

=> b²= Ac

b²= (b)y/x (y/z)

b²= (b)y/x + y/z

2=_y_ + _y_

x z

2(zx) = yx +2y

2Zx = y(x+2).

Y= _2_zx

x+2