<span><span>m=pV
-------------
</span>p = m/V</span>
<span>39 т 915 кг + 49 т 485 кг = 89 т 400 кг. </span>
(5x-2y)^2=25x^2-20xy+4y^2
1) (4a^3)^2
2) (10m^4 n^2)^2
3) (5/9 x^3 y^6)^2
4) (13/15 a^5 b)^2
5) (1,8m^2 p^7)^2
6) (0,17 x^10/y^9)^2
X^2 + 17x + 72 = (x + 9)(x + 8) = (x + 9)(x - a)
--> a = -8