3 1/8 : ((4 5/12 - 3 13/24) * 4/7 + (3 1/18 - 2 7/12) * 1 10/17) = 2 1/2
1) 4 5/12 - 3 13/24 = 4 10/24 - 3 13/24 = 3 34/24 - 3 13/24 = 21/24 = 7/8
2) 7/8 * 4/7 = 4/8 = 1/2
3) 3 1/18 - 2 7/12 = 3 2/36 - 2 21/36 = 2 38/36 - 2 21/36 = 17/36
4) 17/36 * 1 10/17 = 17/36 * 27/17 = 27/36 = 3/4
5) 1/2 + 3/4 = 2/4 + 3/4 = 5/4 = 1 1/4
6) 3 1/8 : 1 1/4 = 25/8 : 5/4 = 25/8 * 4/5 = 5/2 = 2 1/2
(ПРОВЕРЕННО)
(x^3+3^3)/(x-3) - x^2 - 3x -9 =(x+3)(x^2-3x+9)/(x-3) -(x^2+3x+9)=
<u>(x+3)(x^2-3x+9) -(x^2+3x+9)*(x-3)</u> =
x-3
<u>x^3-3x^2+9x+3x^2-9x+27 - x^3+3x^2-3x^2+9x-9x+27</u>=
x-3
<u>
27 +27</u>=
x-3
<u>
54 </u>
x-3
3*3-3*-4=3*-1
*-степень числа
X^2=0.5
x=±√0.5
x=√0,5
x=-√0,5
ответ:√0,5;-√0.5