展开 (21)(2x+y,x)

解答

展开

(21) (2 x + y, x)

(21) \cdot 2 x + (21) y, x

求解步骤

(21) (2 x + y, x)

= (21) (2 x +, x y)

使用分配律:

a (b + c) = ab + a c

a = (21), b = 2 x, c = y, x

= (21) \cdot 2 x + (21) y, x

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