展开 (5x+7)(x+5)'

解答

展开

(5 x + 7) (x + 5)^{'}

5 x (x + 5)' + 7 (x + 5)'

求解步骤

(5 x + 7) (x + 5)^{'}

使用分配律:

a (b + c) = ab + a c

a = (x + 5)^{'}, b = 5 x, c = 7

= (x + 5)^{^{'}} 5 x + (x + 5)^{^{'}} 7

= 5 x (x + 5)^{^{'}} + 7 (x + 5)^{^{'}}

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