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440
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16 and 25
16x^2-40x+25
gives (4x-5) squared
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The two numbers that multiply to 400 and add up to 40 are 20 and 20. This is because 20 x 20 = 400 and 20 + 20 = 40. These numbers satisfy both conditions simultaneously, making them the only pair that meets the criteria.
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