化简 (8b+9)-(7b-5)

解答

化简

(8 b + 9) - (7 b - 5)

b + 14

求解步骤

(8 b + 9) - (7 b - 5)

使用法则:

(a) = a

(8 b + 9) = 8 b + 9

= 8 b + 9 - (7 b - 5)

使用分配律:

- (a - b) = - a + b

- (7 b - 5) = - 7 b + 5

= 8 b + 9 - 7 b + 5

对同类项分组

= 8 b - 7 b + 9 + 5

f a c t or 8 x^{3} + 8

s im pl i f y \frac{x - 1}{x - 1}

s im pl i f y \frac{1 + 3}{4 - 2 3}

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

f a c t or 27 x^{6} + 8 y^{3}