化简 (3x^2-7)-(10x^2-1)

解答

化简

(3 x^{2} - 7) - (10 x^{2} - 1)

- 7 x^{2} - 6

求解步骤

(3 x^{2} - 7) - (10 x^{2} - 1)

使用法则:

(a) = a

(3 x^{2} - 7) = 3 x^{2} - 7

= 3 x^{2} - 7 - (10 x^{2} - 1)

使用分配律:

- (a - b) = - a + b

- (10 x^{2} - 1) = - 10 x^{2} + 1

= 3 x^{2} - 7 - 10 x^{2} + 1

对同类项分组

= 3 x^{2} - 10 x^{2} - 7 + 1

s im pl i f y w^{- 2} w^{- 4} w^{6}

s im pl i f y 25 (3 + 84)

f a c t or r^{2} + r

s im pl i f y x y^{- 6}

s im pl i f y \frac{4 x}{2 x + 3} + \frac{7}{2 x + 3}