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Using the result for (a + b)^4 - (a - b)^4, (sqrt3 + sqrt2)^4 - (sqrt3 - sqrt2)^4 equals
A24 sqrt6
B40 sqrt6
C20 sqrt6
D80 sqrt6
Answer & Solution
Correct answer: B. 40 sqrt6
With a = sqrt3 and b = sqrt2, 8a^3b = 24 sqrt6 and 8ab^3 = 16 sqrt6, giving 40 sqrt6.
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