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If the binary operation * on Z is defined by `a*b=a^2-b^2+a b+4` , then value of `(2*3)*4` is 233 (b) 33 (c) 55 (d) `-55`

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`(2.3)=2^2-3^2+2 xx 3+4`
`=5`
`5.4=5^2-4^2+5 xx 4+4`
`=33`
`(2.3).4=33`
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