展开 V(3,-4)yF(3,2)

解答

展开

V (3, - 4) y F (3, 2)

3 (3 \cdot 2,) V y F, - 4 (3 \cdot 2,) V y F

求解步骤

V (3, - 4) y F (3, 2)

= (3, - 4) (3 \cdot 2,) V y F

使用分配律:

a (b - c) = ab - a c

a = V y F (3, 2), b = 3,, c = 4

= V y F (3, 2) \cdot 3, - V y F (3, 2) \cdot 4

= 3 (3 \cdot 2,) V y F, - 4 (3 \cdot 2,) V y F

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