展开 a+b-2c-sqrt(3)a+sqrt(3)b+sqrt(2)(a+b+c)

解答

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a + b - 2 c - 3 a + 3 b + 2 (a + b + c)

a + b - 2 c - 3 a + 3 b + 2 a + 2 b + 2 c

求解步骤

a + b - 2 c - 3 a + 3 b + 2 (a + b + c)

使用分配律:

m (a + b + c) = ma + mb + m c

2 (a + b + c) = 2 a + 2 b + 2 c

= a + b - 2 c - 3 a + 3 b + 2 a + 2 b + 2 c

e x p an d (3 - 4 x)^{2}

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

s im pl i f y (x - 1 - 2 i)^{3} (x - 1 + 2 i)

s im pl i f y (3 + \frac{3 i}{n})^{2}

e x p an d (4 + 3) (1 + 3)