展开-20(8e-20)

解答

展开

- 20 (8 e - 20)

- 160 e + 400

十进制

- 34.92509 \dots

求解步骤

- 20 (8 e - 20)

使用分配律:

a (b - c) = ab - a c

a = - 20, b = 8 e, c = 20

= - 20 \cdot 8 e - (- 20) \cdot 20

使用加减运算法则

- (- a) = a

= - 20 \cdot 8 e + 20 \cdot 20

化简

- 20 \cdot 8 e + 20 \cdot 20 : - 160 e + 400

= - 160 e + 400

e x p an d \frac{10 ( 7 - 1 )}{7}

e x p an d - \frac{2 ( 45 + 8885 )}{49}

e x p an d \frac{x - 20000}{100 ( x - 200 )}

e x p an d \frac{x ^{2} + 7 x + 10}{2 ( x - 1 ) ^{2}}

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