展开 (3x-x^3)(-7x+pi)+e^9x

解答

展开

(3 x - x^{3}) (- 7 x + π) + e^{9} x

7 x^{4} - π x^{3} - 21 x^{2} + 3 π x + e^{9} x

求解步骤

(3 x - x^{3}) (- 7 x + π) + e^{9} x

乘开

(3 x - x^{3}) (- 7 x + π) : 7 x^{4} - π x^{3} - 21 x^{2} + 3 π x

= 7 x^{4} - π x^{3} - 21 x^{2} + 3 π x + e^{9} x

s im pl i f y (6 - x) \cdot (6 + x)

e x p an d (x + 2)^{4} (1 + \frac{1}{x ^{2}})

e x p an d \frac{4}{7} + \frac{5}{14}

e x p an d \frac{( 4 x ^{3} + 7 ) ^{5}}{( 12 x + 9 ) ^{2}}

e x p an d \frac{z}{( 1 + z ^{3} ) ^{2}}