Asked by Matilda
Given the following matrices A and B,
A=[x y B=[2
-8 −y] and 1]
if the product of the matrices AB=[−23
x]
, find a value of x that satisfies these conditions.
is it -7?
thank you
A=[x y B=[2
-8 −y] and 1]
if the product of the matrices AB=[−23
x]
, find a value of x that satisfies these conditions.
is it -7?
thank you
Answers
Answered by
oobleck
AB =
[2x+y]
[-16-y]
so if that is [-23 x] you have
2x+y = -23
x+y = -16
so x = -7 looks good
[2x+y]
[-16-y]
so if that is [-23 x] you have
2x+y = -23
x+y = -16
so x = -7 looks good
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