Solution
Given : $$(a - b) = -5$$ and $$a^2 + b^2 = 73$$
Using $$(a - b)^2 = a^2 + b^2 - 2ab$$
=> $$(-5)^2 = 73 - (2 \times ab)$$
=> $$2 ab = 73 - 25 = 48$$
=> $$ab = \frac{48}{2} = 24$$
=> Ans - (D)
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