展开-2(2z+1=26)

解答

展开

- 2 (2 z + 1 = 26)

- 4 z - 2 = 26

求解步骤

- 2 (2 z + 1 = 26)

= - 2 (2 z + 1 \cdot 26 =)

使用分配律:

a (b + c) = ab + a c

a = - 2, b = 2 z, c = 1 = 26

- 2 \cdot 2 z + (- 2) \cdot 1 = 26

使用加减运算法则

+ (- a) = - a

- 2 \cdot 2 z - 2 \cdot 1 = 26

乘开

- 2 \cdot 2 z - 2 \cdot 1 : - 4 z - 2

- 4 z - 2 = 26

e x p an d \frac{b}{x ( x + a )}

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

e x p an d \frac{1}{( a - x ) ^{2}}

e x p an d (4 x) (4 x) + (x) (x)

e x p an d \frac{x ( x + 1 )}{x - 5}