展开 2(e+1)(e-1)

解答

展开

2 (e + 1) (e - 1)

2 e^{2} - 2

十进制

12.77811 \dots

求解步骤

2 (e + 1) (e - 1)

乘开

(e + 1) (e - 1) : e^{2} - 1

= 2 (e^{2} - 1)

乘开

2 (e^{2} - 1) : 2 e^{2} - 2

= 2 e^{2} - 2

e x p an d cos (t) u (t - 1)

e x p an d 3 (4^{x + 1})

e x p an d - \frac{d}{d x} (e^{- x (α + \frac{β x}{2})})

s im pl i f y (14 + x^{2} + y^{2} + z^{2}) 6

s im pl i f y 336 + \frac{3 36}{108} (x - 36)