Annual competition for pre- college students.
More than 100 countries participate, and each country sends a team of six students.
Day 1 : Solve three questions in 4.5 hours.
Day 2 : Solve another three questions in 4.5 hours .
Each problem is worth 7 points, for a total of 42 points.
In 2019, the individual mean score was above 16 points.
What will be in 2020 ?
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We will discuss here about the of (x ± a)(x ± b). (x + a)(x + b) = x(x ... (x + a)(x + b) = x2 + (Sum of constant terms)x + Product of constant terms. ... Product = (x – 3)(x + 2). = x2 + (-3 + 2)x + (-3) ∙ 2. = x2 – x – 6. Now plug-in x = 2m + n.
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