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Let R={(x , y): x , y in Z ,\ y=2x-4}do...

Let `R={(x , y): x , y in Z ,\ y=2x-4}dotIf\ (a,-2)\ a n d\ (4, b^2) in R ,` then write the values of a and b.

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Here,`R={(x,y):x,yinZ,y=2x−4}`
Now,`(a,−2) inR`
=`−2=2a−4`
=`2a=−2+4`
=`2a=2`
=`a=1`
Also,`(4,b^2)inR`
=`b^2=2xx4−4`
...
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