展开 (g\circ h)(z-7)

解答

展开

(g \circ h) (z - 7)

\circ g h z - 7 \circ g h

求解步骤

(g \circ h) (z - 7)

= (\circ g h) (z - 7)

使用分配律:

a (b - c) = ab - a c

a = (g \circ h), b = z, c = 7

= (g \circ h) z - (g \circ h) \cdot 7

= z (\circ g h) - 7 (\circ g h)

去除括号:

(a) = a

= \circ g h z - 7 \circ g h

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