展开 2x+4(2-5x=3)

解答

展开

2 x + 4 (2 - 5 x = 3)

- 18 x + 8 = 3

求解步骤

2 x + 4 (2 - 5 x = 3)

= 2 x + 4 (2 - 5 \cdot 3 = x)

乘开

4 (2 - 5 x = 3) : 8 - 20 x = 3

2 x + 8 - 20 x = 3

乘开

2 x + 8 - 20 x : - 18 x + 8

- 18 x + 8 = 3

e x p an d \frac{z + 0.5}{z ( z - 1 ) ( z - 2 ) ( z - 3 )}

e x p an d \frac{x ( x + 1 ) ( x - 6 )}{x + 8}

e x p an d π^{e^{1}} - arccos (1)

e x p an d cos (\frac{π}{2} \cdot (x + 1))

s im pl i f y (e^{i wt} + e^{- i wt}) e^{- i wt}