展开 3(2s= 1/3 a-2b)

解答

展开

3 (2 s = \frac{1}{3} a - 2 b)

6 s = \frac{a}{3} - 6 b

求解步骤

3 (2 s = \frac{1}{3} a - 2 b)

= 3 (2 \cdot \frac{1}{3} = a s - 2 b)

使用分配律:

a (b - c) = ab - a c

a = 3, b = 2 s = \frac{1}{3} a, c = 2 b

3 \cdot 2 s = \frac{1}{3} a - 3 \cdot 2 b

化简

3 \cdot 2 s = \frac{1}{3} a - 3 \cdot 2 b : 6 s = \frac{a}{3} - 6 b

6 s = \frac{a}{3} - 6 b

e x p an d 2 x y d x + (y^{2} - 3 x^{2}) d y

e x p an d (210 - e^{2}) \cdot 100

e x p an d \frac{1}{( x ^{6} - 4 ) ^{2}}

e x p an d \frac{1}{P ( 0.0394 - 0.0002 P )}

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