展开 1/2 (3+4t-10)

解答

展开

\frac{1}{2} (3 + 4 t - 10)

- \frac{7}{2} + 2 t

求解步骤

\frac{1}{2} (3 + 4 t - 10)

使用分配律:

m (a + b + c) = ma + mb + m c

\frac{1}{2} (3 + 4 t - 10) = \frac{1}{2} \cdot 3 + \frac{1}{2} \cdot 4 t + \frac{1}{2} (- 10)

= \frac{1}{2} \cdot 3 + \frac{1}{2} \cdot 4 t + \frac{1}{2} (- 10)

化简

\frac{1}{2} \cdot 3 + \frac{1}{2} \cdot 4 t + \frac{1}{2} (- 10) : - \frac{7}{2} + 2 t

= - \frac{7}{2} + 2 t

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