展开 ((s-3))/((s+3)^2)

解答

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\frac{( s - 3 )}{( s + 3 ) ^{2}}

\frac{s - 3}{s ^{2} + 6 s + 9}

求解步骤

\frac{s - 3}{( s + 3 ) ^{2}}

(s + 3)^{2} = s^{2} + 6 s + 9

= \frac{s - 3}{s ^{2} + 6 s + 9}

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

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