展开-(8x)/((x^2-4)^2)

解答

展开

- \frac{8 x}{( x ^{2} - 4 ) ^{2}}

- \frac{8 x}{x ^{4} - 8 x ^{2} + 16}

求解步骤

- \frac{8 x}{( x ^{2} - 4 ) ^{2}}

(x^{2} - 4)^{2} = x^{4} - 8 x^{2} + 16

= - \frac{8 x}{x ^{4} - 8 x ^{2} + 16}

s im pl i f y (3 - i)^{4}

e x p an d (\frac{4}{16} x + \frac{5}{16} y + \frac{3}{16} z + \frac{4}{16} u)^{4}

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

s im pl i f y (2 + i)^{5}

e x p an d \frac{( 1 + j ^{3} ) ( 1 + j ^{7} )}{( 7 - j ^{9} ) ( 2 - j )}