展开 a(18,4)b(11,2)c(-3,-2)

解答

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a (18, 4) b (11, 2) c (- 3, - 2)

- 3 (18 \cdot 4,) (11 \cdot 2,) ab c, - 2 (18 \cdot 4,) (11 \cdot 2,) ab c

求解步骤

a (18, 4) b (11, 2) c (- 3, - 2)

= (18 \cdot 4,) (11 \cdot 2,) (- 3, - 2) ab c

使用分配律:

a (b - c) = ab - a c

a = a (18, 4) b (11, 2) c, b = - 3,, c = 2

= a (18, 4) b (11, 2) c (- 3,) - a (18, 4) b (11, 2) c \cdot 2

使用加减运算法则

+ (- a) = - a

= - 3 (18 \cdot 4,) (11 \cdot 2,) ab c, - 2 (18 \cdot 4,) (11 \cdot 2,) ab c

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