因式分解 x^2-2x-16

解答

因式分解

x^{2} - 2 x - 16

(x - 1 - 17) (x - 1 + 17)

求解步骤

x^{2} - 2 x - 16

解

x^{2} - 2 x - 16 = 0 : x = 1 + 17, x = 1 - 17

多项式因此可因式分解为

= (x - (1 + 17)) (x - (1 - 17))

整理后得

= (x - 1 - 17) (x + 17 - 1)

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