化简 (14.2a+9.8b)-(13.1b-0.2a)-(3.7a+4.8b)

解答

化简

(14.2 a + 9.8 b) - (13.1 b - 0.2 a) - (3.7 a + 4.8 b)

10.7 a - 8.1 b

求解步骤

(14.2 a + 9.8 b) - (13.1 b - 0.2 a) - (3.7 a + 4.8 b)

使用法则:

(a) = a

(14.2 a + 9.8 b) = 14.2 a + 9.8 b

= 14.2 a + 9.8 b - (13.1 b - 0.2 a) - (3.7 a + 4.8 b)

- (13.1 b - 0.2 a) = - 13.1 b + 0.2 a

- (3.7 a + 4.8 b) = - 3.7 a - 4.8 b

= 14.2 a + 9.8 b - 13.1 b + 0.2 a - 3.7 a - 4.8 b

对同类项分组

= 14.2 a + 0.2 a - 3.7 a + 9.8 b - 13.1 b - 4.8 b

e x p an d (2 x + z)^{3}

x^{3} - 33 \cdot y^{3}

s im pl i f y (\frac{1}{5 x})^{2}

f a c t or x^{6} - 1000

f a c t or x y + 10 x^{2} - 2 y^{2}