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If a binary operation * is defined by `a*b=a^2+b^2+a b+1` , then `(2*3)*2` is equal to (a) 20 (b) 40 (c) 400 (d) 445

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`(2.3)=2^2+3^2+2 xx3+1`
`=20`
`20.2=20^2+2^2+20 xx 2+1`
`=445`
`(2.3).2=445`
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