化简 sqrt(3)(4+sqrt(12))

解答

化简

3 (4 + 12)

43 + 6

十进制

12.92820 \dots

求解步骤

3 (4 + 12)

12 = 23

= 3 (4 + 23)

使用分配律:

a (b + c) = ab + a c

3 (4 + 23) = 3 \cdot 4 + 3 \cdot 23

= 3 \cdot 4 + 3 \cdot 23

3 \cdot 4 = 43

3 \cdot 23 = 6

= 43 + 6

15 (2 - k) = k + 6

0 = x^{2} - 6 x + 2

- 3 \cdot (x - 2) - 6 x = 8 \cdot (2 x + 7)

- 7 = a (0 + 6) (0 - 9)

5 y^{2} + 6 y \geq 8