展开 (0.2m-3n)*x^{0.7}m

解答

展开

(0.2 m - 3 n) \cdot x^{0.7} m

0.2 m^{2} x^{0.7} - 3 m x^{0.7} n

求解步骤

(0.2 m - 3 n) x^{0.7} m

= m x^{0.7} (0.2 m - 3 n)

使用分配律:

a (b - c) = ab - a c

m x^{0.7} (0.2 m - 3 n) = m x^{0.7} \cdot 0.2 m - m x^{0.7} \cdot 3 n

= m x^{0.7} \cdot 0.2 m - m x^{0.7} \cdot 3 n

化简

m x^{0.7} \cdot 0.2 m - m x^{0.7} \cdot 3 n : 0.2 m^{2} x^{0.7} - 3 m x^{0.7} n

= 0.2 m^{2} x^{0.7} - 3 m x^{0.7} n

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

s im pl i f y \frac{[ ( 2 x - 4 ) 3 ]}{2}

e x p an d (3 a + 5 b)^{2} - 4 c^{2}

s im pl i f y det (a^{- 1})

s im pl i f y 3.5 b - 2.4 c - 0.6 c - 0.7 b