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Aplicamos:
(x-14)²=x²-2(x)(-14)+(-14)²
= x²+28x+196
Rpta: x²+28x+196
(a - b)² = a² - 2ab + b²
Entonces:
(x - 14)² =
(x)² - 2 (x) (14) + (14)² =
x² - 28x +196 = Respuesta.
Salu2 Megan.