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If [x y4z+6x+y]=[8w0 6] , then find the ...

If `[x y4z+6x+y]=[8w0 6]` , then find the values of `x ,\ y ,\ z\ a n d\ w` .

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By comparing elements we get,
` x+y=6, x y=8, z+6=0 ` { and }` w=4`
From first two equations
` (6-y) cdot y=8`
` Rightarrow y^{2}-6 y+8=0`
` Rightarrow (y-2)(y-4)=0`
` ...
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RD SHARMA-ALGEBRA OF MATRICES-Solved Examples And Exercises
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  11. A=[(2,-1),(3,1)] and B=[(1,4),(7,2)] , find 3A-2Bdot

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