展开 pi(-(128sqrt(2))/5+128sqrt(2))

解答

展开

π (- \frac{128 2}{5} + 1282)

- \frac{128 2 π}{5} + 1282 π

十进制

454.95121 \dots

求解步骤

π (- \frac{128 2}{5} + 1282)

使用分配律:

a (b + c) = ab + a c

a = π, b = - \frac{128 2}{5}, c = 1282

= π (- \frac{128 2}{5}) + π 1282

使用加减运算法则

+ (- a) = - a

= - π \frac{128 2}{5} + 1282 π

乘

π \frac{128 2}{5} : \frac{128 2 π}{5}

= - \frac{128 2 π}{5} + 1282 π

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