If a=2 and b=-2, find the value of : (i...

If `a=2 and b=-2,` find the value of :
`(i)` `a^(2)+b^(2)`
`(ii)` `a^(2)+ab+b^(2)`
`(iii)` `a^(2)-b^(2)`

Verified by Experts

`=>a^2+b^2`
`=>(2)^2+(−2)^2` [Putting `a=2,b=−2]`
`=>4+4=8`

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