展开+10y^2at(2,1,-14)

解答

展开

+ 10 y^{2} a t (2, 1, - 14)

10 \cdot 2 a y^{2} t, 1, - 10 \cdot 14 a y^{2} t

求解步骤

10 y^{2} a t (2, 1, - 14)

= 10 (2 \cdot 1,, - 14) a y^{2} t

使用分配律:

a (b - c) = ab - a c

a = 10 y^{2} a t, b = 2, 1,, c = 14

= 10 y^{2} a t \cdot 2, 1, - 10 y^{2} a t \cdot 14

= 10 \cdot 2 a y^{2} t, 1, - 10 \cdot 14 a y^{2} t

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