展开 ((8.25+5a)^2)/((20a^3+74a^2+101.25a+50))

解答

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\frac{( 8.25 + 5 a ) ^{2}}{( 20 a ^{3} + 74 a ^{2} + 101.25 a + 50 )}

\frac{68.0625 + 82.5 a + 25 a ^{2}}{20 a ^{3} + 74 a ^{2} + 101.25 a + 50}

求解步骤

\frac{( 8.25 + 5 a ) ^{2}}{20 a ^{3} + 74 a ^{2} + 101.25 a + 50}

(8.25 + 5 a)^{2} = 68.0625 + 82.5 a + 25 a^{2}

= \frac{68.0625 + 82.5 a + 25 a ^{2}}{20 a ^{3} + 74 a ^{2} + 101.25 a + 50}

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e x p an d (x^{2} - 2)^{2} d x

e x p an d (x^{2} - 2 x - 1)^{5}

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