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Could you show me the workings of this?

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1 Answer
Mar 7, 2018




When adding matrices, simply add the elements in the same row and column of the terms to get the value of the element in the resulting sum matrix.

#( (2,-5),(4,1),(color(red)(-2),2))+((-2,7),(-7,2),(color(red)(-8),2))+((4,-4),(-7,-6),(color(red)(-5),4))#

#color(white)("XXX")=((2-2+4, -5+7-4),(4-7-7, 1+2-6),(color(red)(-2-8-5), 2+2+4))#