化简 (1-1/b)(mr^2-I)

解答

化简

(1 - \frac{1}{b}) (m r^{2} - I)

\frac{( b - 1 ) ( m r ^{2} - I )}{b}

求解步骤

(1 - \frac{1}{b}) (m r^{2} - I)

合并

1 - \frac{1}{b} : \frac{b - 1}{b}

= \frac{b - 1}{b} (m r^{2} - I)

使用分式法则:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{( b - 1 ) ( m r ^{2} - I )}{b}

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