展开-(1.60754(2.06317741k^2+3989.1792))/k

解答

展开

- \frac{1.60754 ( 2.06317741 k ^{2} + 3989.1792 )}{k}

- 3.31664 \dots k - \frac{6412.76513 \dots}{k}

求解步骤

- \frac{1.60754 ( 2.06317741 k ^{2} + 3989.1792 )}{k}

乘开

1.60754 (2.06317741 k^{2} + 3989.1792) : 3.31664 \dots k^{2} + 6412.76513 \dots

= - \frac{3.31664 \dots k ^{2} + 6412.76513 \dots}{k}

使用分式法则:

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

\frac{3.31664 \dots k ^{2} + 6412.76513 \dots}{k} = - (\frac{3.31664 \dots k ^{2}}{k}) - (\frac{6412.76513 \dots}{k})

= - (\frac{3.31664 \dots k ^{2}}{k}) - (\frac{6412.76513 \dots}{k})

去除括号:

(a) = a

= - \frac{3.31664 \dots k ^{2}}{k} - \frac{6412.76513 \dots}{k}

消掉

\frac{3.31664 \dots k ^{2}}{k} : 3.31664 \dots k

= - 3.31664 \dots k - \frac{6412.76513 \dots}{k}

e x p an d \frac{( 0.04 - x ) ( 0.03 - x )}{( 0.02 + x ) ( 0.04 + x )}

e x p an d (x - 1) (x - e^{- 1.5}) (x - e^{- 10})

e x p an d (e^{2 x} cos (3 y)) (1 + 2 x)

e x p an d u (- t - 1) e^{2 t}

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