展开 18pi(pi/(12)-1/4)

解答

展开

18 π (\frac{π}{12} - \frac{1}{4})

\frac{3 π ^{2}}{2} - \frac{9 π}{2}

十进制

0.66723 \dots

求解步骤

18 π (\frac{π}{12} - \frac{1}{4})

使用分配律:

a (b - c) = ab - a c

a = 18 π, b = \frac{π}{12}, c = \frac{1}{4}

= 18 π \frac{π}{12} - 18 π \frac{1}{4}

化简

18 π \frac{π}{12} - 18 π \frac{1}{4} : \frac{3 π ^{2}}{2} - \frac{9 π}{2}

= \frac{3 π ^{2}}{2} - \frac{9 π}{2}

e x p an d h (x) in v ers a (9 - 2 x)

e x p an d \frac{( 2 x ( 200 - 4 x ) )}{3}

e x p an d 7 e (5 e - 7) + 2 (9 e^{2} - 8)

e x p an d (X) + (Y Z)

e x p an d (7 e - 4 f)^{2}