Mathematics · Quadratic Expressions

If 4 + 3x - 7x 2 attains its maximum value M at x = α and 5x 2 - 2x + 1 attains its minimum value m at x = β, then 28(M - α) 5(m + β) =

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If 4 + 3x - 7x 2 attains its maximum value M at x = &alpha; and 5x 2 - 2x + 1 attains its minimum value m at x = &beta;, then 28(M - &alpha;) 5(m + &beta;) =