展开 (3,-2)y(7,6)

解答

展开

(3, - 2) y (7, 6)

3 (7 \cdot 6,) y, - 2 (7 \cdot 6,) y

求解步骤

(3, - 2) y (7, 6)

= (3, - 2) (7 \cdot 6,) y

使用分配律:

a (b - c) = ab - a c

a = y (7, 6), b = 3,, c = 2

= y (7, 6) \cdot 3, - y (7, 6) \cdot 2

= 3 (7 \cdot 6,) y, - 2 (7 \cdot 6,) y

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