展开-3(27pi^3-1)

解答

展开

- 3 (27 π^{3} - 1)

- 81 π^{3} + 3

十进制

- 2508.50841 \dots

求解步骤

- 3 (27 π^{3} - 1)

使用分配律:

a (b - c) = ab - a c

a = - 3, b = 27 π^{3}, c = 1

= - 3 \cdot 27 π^{3} - (- 3) \cdot 1

使用加减运算法则

- (- a) = a

= - 3 \cdot 27 π^{3} + 3 \cdot 1

化简

- 3 \cdot 27 π^{3} + 3 \cdot 1 : - 81 π^{3} + 3

= - 81 π^{3} + 3

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