# distributive property

• August 12th 2012, 11:07 AM
Chipset3600
distributive property
Hello guys i hv a doubt, the only distributive property i know in Linear Algebra is: A(C+B) = AC+BC

I wan to know if (A+B).(A-B) =
a²-b² is valid

But the matrix A is order 4x2 and the matrix B order 2x4

• August 12th 2012, 11:13 AM
Plato
Re: distributive property
Quote:

Originally Posted by Chipset3600
Hello guys i hv a doubt, the only distributive property i know in Linear Algebra is: A(C+B) = AC+BC
I wan to know if (A+B).(A-B) = [LEFT]a²-b² is valid
But the matrix A is order 4x2 and the matrix B order 2x4

None of that is valid. You cannot even add $A_{4\times 2}+B_{2\times 4}~!$