化简 2x(x-1)-4(2x+3)

解答

化简

2 x (x - 1) - 4 (2 x + 3)

2 x^{2} - 10 x - 12

求解步骤

2 x (x - 1) - 4 (2 x + 3)

展开

2 x (x - 1) : 2 x^{2} - 2 x

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

展开

- 4 (2 x + 3) : - 8 x - 12

= 2 x^{2} - 2 x - 8 x - 12

s im pl i f y (a + bi) (a + bi)

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

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

s im pl i f y (x - 3)^{2} + 8 (x - 3) + 5

s im pl i f y 4 + 3 - 2 \cdot + 6 (6 - 9)