展开 (10,8,-7)(x,0,z)

解答

展开

(10, 8, - 7) (x, 0, z)

10 (0,, x z), 8, - 7 (0,, x z)

求解步骤

(10, 8, - 7) (x, 0, z)

= (10 \cdot 8,, - 7) (0,, x z)

使用分配律:

a (b - c) = ab - a c

a = (x, 0, z), b = 10, 8,, c = 7

= (x, 0, z) \cdot 10, 8, - (x, 0, z) \cdot 7

= 10 (0,, x z), 8, - 7 (0,, x z)

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