化简 (3x-4)-(5x+2)

解答

化简

(3 x - 4) - (5 x + 2)

- 2 x - 6

求解步骤

(3 x - 4) - (5 x + 2)

使用法则:

(a) = a

(3 x - 4) = 3 x - 4

= 3 x - 4 - (5 x + 2)

使用分配律:

- (a + b) = - a - b

- (5 x + 2) = - 5 x - 2

= 3 x - 4 - 5 x - 2

对同类项分组

= 3 x - 5 x - 4 - 2

s im pl i f y (\frac{2}{b ^{2}})^{3} \cdot (\frac{b ^{3}}{4})^{2} \cdot (\frac{1}{b ^{2}})^{2}

s im pl i f y (3 + 2 i) + [(4 - 5 i) - (5 + i)]

s im pl i f y \frac{a + b}{a ^{2} + ab} - \frac{b - a}{ab + b ^{2}}

f a c t or 8 u^{4} + u

e x p an d (4 x + 3 y) (6 x - 5 y)