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Find (a +b)^4 - (a - b)^4. Hence, evalua...

Find `(a +b)^4` - `(a - b)^4`. Hence, evaluate `(sqrt3 + sqrt2)^4` - `(sqrt3 - sqrt2)^4`.

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The correct Answer is:
8(`a^3`b + `ab^3`); 40 `sqrt6`
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