展开 2(1-x)(13.4784,26)

解答

展开

2 (1 - x) (13.4784, 26)

2 \cdot 1 \cdot (26 \cdot 13.4784,) - 2 (26 \cdot 13.4784,) x

求解步骤

2 (1 - x) (13.4784, 26)

= 2 (26 \cdot 13.4784,) (1 - x)

使用分配律:

a (b - c) = ab - a c

a = 2 (13.4784, 26), b = 1, c = x

= 2 (13.4784, 26) \cdot 1 - 2 (13.4784, 26) x

= 2 \cdot 1 \cdot (26 \cdot 13.4784,) - 2 (26 \cdot 13.4784,) x

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e x p an d 3 \cdot ∣ x - 1 ∣^{2}

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