Posted by **edward** on Thursday, April 4, 2013 at 10:55am.

a matrix X has a+b rows and a+2 columns while the matrix Y has b+1 rows and a+3 columns. both matrices XY and YX exist. find a and b. can you say XY and YX sre of same type? are they equal?

- maths -
**Vikas singh**, Friday, April 19, 2013 at 3:59am
[X]

a+b*a+3;

[Y]

b+1*a+3;

so,

a+2=b+1 ...1

a+b=a+3

a is cut so,

b=3,

now,

put b=3 in (1)

a+2=3+1

a=4-2

a=2

a=2 and b=3.

XX and YX are not of the same type .they are unequal.

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