化简 (10x^2+3)-(9x^2+4x+1)

解答

化简

(10 x^{2} + 3) - (9 x^{2} + 4 x + 1)

x^{2} - 4 x + 2

求解步骤

(10 x^{2} + 3) - (9 x^{2} + 4 x + 1)

使用法则:

(a) = a

(10 x^{2} + 3) = 10 x^{2} + 3

= 10 x^{2} + 3 - (9 x^{2} + 4 x + 1)

使用分配律:

- (a + b) = - a - b

- (9 x^{2} + 4 x + 1) = - 9 x^{2} - 4 x - 1

= 10 x^{2} + 3 - 9 x^{2} - 4 x - 1

对同类项分组

= 10 x^{2} - 9 x^{2} - 4 x + 3 - 1

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

s im pl i f y 4 - 36

s im pl i f y 4 (3 - 4 x)

s im pl i f y (- 23 + 2) (3 - 5)

f a c t or 9 x^{6} - 25