展开 (x-5/4)(x-5/4)

解答

展开

(x - \frac{5}{4}) (x - \frac{5}{4})

x^{2} - \frac{5 x}{2} + \frac{25}{16}

求解步骤

(x - \frac{5}{4}) (x - \frac{5}{4})

Apply FOIL method

(x - \frac{5}{4}) (x - \frac{5}{4}) : x^{2} - \frac{5 x}{2} + \frac{25}{16}

= x^{2} - \frac{5 x}{2} + \frac{25}{16}

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

e x p an d (0, - 5) (x - 1)

e x p an d \frac{s ^{2} + s - 10 + e ^{- s}}{( s - 1 ) ( s - 2 ) ( s + 4 )}

s im pl i f y (3 + 36) (3 - 36)

e x p an d 24 e^{- 20 t} + 20 (\frac{6}{5} - \frac{6}{5} e^{- 20 t})