0
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A trinomial.
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-10
x2 + 20x + 4 = 0 x2 + 20x + 100 = 96 (x + 10)2 = 96 x + 10 = ±961/2 x = -10 ±961/2 x = -10 ±4√6
(x - 10)(x - 10)
4x2 - 20x + 16 = 4(x2 - 5x + 4) = 4(x - 1)(x - 4)
20x -5