化简 (2a-3b)4b-3a(a-2b)

解答

化简

(2 a - 3 b) 4 b - 3 a (a - 2 b)

14 ab - 12 b^{2} - 3 a^{2}

求解步骤

(2 a - 3 b) \cdot 4 b - 3 a (a - 2 b)

= 4 b (2 a - 3 b) - 3 a (a - 2 b)

展开

4 b (2 a - 3 b) : 8 ab - 12 b^{2}

= 8 ab - 12 b^{2} - 3 a (a - 2 b)

展开

- 3 a (a - 2 b) : - 3 a^{2} + 6 ab

= 8 ab - 12 b^{2} - 3 a^{2} + 6 ab

对同类项分组

= 8 ab + 6 ab - 12 b^{2} - 3 a^{2}

f a c t or 3 a^{2} - 4 ab - 20 b^{2}

f a c t or 4 c^{2} - 9 d^{2}

\frac{r}{2} > 2

s im pl i f y \frac{7 ^{2}}{7 ^{2} - 4} - \frac{1}{7 - 2}

\frac{4}{17} x = 16