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# A simple inequality

Let $a,b$ be real numbers satisfying $(a+3)(b+6) \geq 28$. Find the minimum value of the following expression: $P=(a^2+1)(b^2+4)+\frac{(16+2ab)^2}{18}$

Note by Nghĩa Phan Minh
3 years, 10 months ago

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