展开 (-5)/((2.5-2)^2)

解答

展开

\frac{- 5}{( 2.5 - 2 ) ^{2}}

- 20

求解步骤

\frac{- 5}{( 2.5 - 2 ) ^{2}}

数字相减:

2.5 - 2 = 0.5

= \frac{- 5}{0. 5 ^{2}}

使用分式法则:

\frac{- a}{b} = - \frac{a}{b}

= - \frac{5}{0. 5 ^{2}}

0. 5^{2} = 0.25

= - \frac{5}{0.25}

数字相除:

\frac{5}{0.25} = 20

= - 20

e x p an d \frac{x ( ( 2 x + 5 ) ^{\frac{3}{2}} - ( - 2 x + 5 ) ^{\frac{3}{2}} )}{3}

e x p an d \frac{4}{( s + 3 ) ^{2} ( s ^{2} + 7 s + 10 )}

e x p an d \frac{1}{( x - 3 ) ( x + 2 )}

s im pl i f y 1 - \frac{14 ( 0.02 x + 1 )}{x ^{3} + 25 x ^{2} + 84.28 x + 14}

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