# Could you answer question 6 ?

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Jim G.
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Mar 9, 2018

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#"Given a matrix A then the inverse matrix is "A^-1#

#A=((a,b),(c,d))#

#rArrA^-1=1/(ad-bc)((d,-b),(-c,a))#

#"here "A=((-6,3),(4,6))#

#"the element a in "A^-1" is therefore "a=-3#

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