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-- First, write the quadratic formula on the back of your hand:
x = 1/2A [ -B ± sqrt(B2 - 4AC) ]
-- Then, stare at your equation until it dawns on you that
- A = 12
- B = -77
- C = -20
-- Substitute these values of 'A', 'B', and 'C' into the quadratic formula,
evaluate it for the two values of 'x', and the two solutions practically
fall out on the floor and surrender, on their own.
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∙ 11y ago
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