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受欢迎的代数 >

化简-4(1-a)-(5+a)2-(a+1)(a-1)*0.3

解答

化简

- 4 (1 - a) - (5 + a) 2 - (a + 1) (a - 1) \cdot 0.3

解答

- 0.3 a^{2} + 2 a - 13.7

求解步骤

- 4 (1 - a) - (5 + a) \cdot 2 - (a + 1) (a - 1) \cdot 0.3

= - 4 (1 - a) - 2 (5 + a) - 0.3 (a + 1) (a - 1)

展开

- 4 (1 - a) : - 4 + 4 a

= - 4 + 4 a - 2 (5 + a) - 0.3 (a + 1) (a - 1)

展开

- 2 (5 + a) : - 10 - 2 a

= - 4 + 4 a - 10 - 2 a - 0.3 (a + 1) (a - 1)

展开

- 0.3 (a + 1) (a - 1) : - 0.3 a^{2} + 0.3

= - 4 + 4 a - 10 - 2 a - 0.3 a^{2} + 0.3

对同类项分组

= - 0.3 a^{2} + 4 a - 2 a - 4 - 10 + 0.3

同类项相加:

4 a - 2 a = 2 a

= - 0.3 a^{2} + 2 a - 4 - 10 + 0.3

数字相加:

- 4 - 10 + 0.3 = - 13.7

= - 0.3 a^{2} + 2 a - 13.7

流行的例子

化简 (-5m^6n^8)^4

s im pl i f y (- 5 m^{6} n^{8})^{4}

化简 ((5x^2-15x))/((5x^2+15x))

s im pl i f y \frac{( 5 x ^{2} - 15 x )}{( 5 x ^{2} + 15 x )}

因式分解 3x^2y^2+4y^4

f a c t or 3 x^{2} y^{2} + 4 y^{4}

展开 (2p+7q)^3

e x p an d (2 p + 7 q)^{3}

化简 (3t^3)^2

s im pl i f y (3 t^{3})^{2}