展开 (3x^2-2x-3)/((x^2+1)^2)

解答

展开

\frac{3 x ^{2} - 2 x - 3}{( x ^{2} + 1 ) ^{2}}

\frac{3 x ^{2} - 2 x - 3}{x ^{4} + 2 x ^{2} + 1}

求解步骤

\frac{3 x ^{2} - 2 x - 3}{( x ^{2} + 1 ) ^{2}}

(x^{2} + 1)^{2} = x^{4} + 2 x^{2} + 1

= \frac{3 x ^{2} - 2 x - 3}{x ^{4} + 2 x ^{2} + 1}

e x p an d lo g_{10} (t^{9})

e x p an d \frac{2 y - 6}{5 ( y ^{2} - 6 y ) ^{\frac{4}{5}}}

s im pl i f y 10 (lo g_{10} (141) + 12)

s im pl i f y cot (x) (\frac{1}{3 cos ( x )} + tan (x))

e x p an d (sin (x) + x cos (x)) (3 cos (x sin (x)))