展开 3/((x-7)^2)

解答

展开

\frac{3}{( x - 7 ) ^{2}}

\frac{3}{x ^{2} - 14 x + 49}

求解步骤

\frac{3}{( x - 7 ) ^{2}}

(x - 7)^{2} = x^{2} - 14 x + 49

= \frac{3}{x ^{2} - 14 x + 49}

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