展开-(5(5+sqrt(41)))/4

解答

展开

- \frac{5 ( 5 + 41 )}{4}

- \frac{25}{4} - \frac{5 41}{4}

十进制

- 14.25390 \dots

求解步骤

- \frac{5 ( 5 + 41 )}{4}

乘开

5 (5 + 41) : 25 + 541

= - \frac{25 + 5 41}{4}

使用分式法则:

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

\frac{25 + 5 41}{4} = - (\frac{25}{4}) - (\frac{5 41}{4})

= - (\frac{25}{4}) - (\frac{5 41}{4})

去除括号:

(a) = a

= - \frac{25}{4} - \frac{5 41}{4}

s im pl i f y (4 - 14 - x) (4 + 14 - x)

s im pl i f y (2 x + 3 + 2)^{2}

e x p an d \frac{e ^{x} ( x ^{2} + 1 ) - 2 x e ^{x}}{( x ^{2} + 1 ) ^{2}}

e x p an d \frac{7}{( 4 + x ) ^{3}}

e x p an d e^{2 t} t^{\frac{1}{5}} + t u (t - 4)