Maxtrice number 4 ?

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1 Answer
Jim G.
Mar 8, 2018

#-17#

Explanation:

#"note that "A^2" is not the result of squaring the"#
#"elements in matrix A"#

#"the element in row 2 , column 2 of "A^2#

#"is the result of multiplying the elements in row 2"#
#"with the corresponding elements in column 2"#

#"that is "#

#((1,1,9))((0),(1),(-2))#

#=(1xx0)+(1xx1)+(9xx-2)#

#=0+1-18=-17#

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