# What matrix is the result of m×H?

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- AlanLv 73 weeks agoFavourite answer
Due to the matrix size.

It only makes sense if m is scalar constant

so H is 3 X 1 matrix

if m X H is also a 3 X 1 matrix

then, m is either a scalar constant or a 3 X 3 matrix

The first equation could not be true if m is a 3 X 3 matrix

so "m" must be a scalar constant .

let A = [ -1 2 2nd row 4 8]

then the 1st equation becomes

5A = (2/5)mA

mutliple both sides by A^(-1) on the right

5I = (2/5)mI

m = 25/2

H + [ 4 6 -8 ] = [ 2 9 -9 ]

H= [ 2 9 -9 ] - [ 4 6 -8] = [-2 3 -1]

m X H = (25/2) [ -2 3 -1 ] = [ -25 (75/2) (-25/2) ]

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