longdivision ((2x^2-x-21))/((x^2-1))

解答

长除法

\frac{( 2 x ^{2} - x - 21 )}{( x ^{2} - 1 )}

2 + \frac{- x - 19}{x ^{2} - 1}

求解步骤

\frac{( 2 x ^{2} - x - 21 )}{( x ^{2} - 1 )}

对

\frac{2 x ^{2} - x - 21}{x ^{2} - 1}

做除法:

\frac{2 x ^{2} - x - 21}{x ^{2} - 1} = 2 + \frac{- x - 19}{x ^{2} - 1}

= 2 + \frac{- x - 19}{x ^{2} - 1}

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