Числители раскладываем по формулам суммы/разности кубов:
![\displaystyle \ \ \ \ \frac{a-b}{\sqrt[3]{a}-\sqrt[3]{b}}-\frac{a+b}{\sqrt[3]{a}+\sqrt[3]{b}}=\\\\\\=\frac{(\sqrt[3]{a}-\sqrt[3]{b})(\sqrt[3]{a^2}+\sqrt[3]{ab}+\sqrt[3]{b^2})}{\sqrt[3]{a}-\sqrt[3]{b}}-\frac{(\sqrt[3]{a}+\sqrt[3]{b})(\sqrt[3]{a^2}-\sqrt[3]{ab}+\sqrt[3]{b^2})}{\sqrt[3]{a}+\sqrt[3]{b}}=\\\\\\=\sqrt[3]{a^2}+\sqrt[3]{ab}+\sqrt[3]{b^2}-(\sqrt[3]{a^2}-\sqrt[3]{ab}+\sqrt[3]{b^2})=\\\\\\= \sqrt[3]{a^2}+\sqrt[3]{ab}+\sqrt[3]{b^2}-\sqrt[3]{a^2}+\sqrt[3]{ab}-\sqrt[3]{b^2}=2\sqrt[3]{ab}](https://tex.z-dn.net/?f=%5Cdisplaystyle+%5C+%5C+%5C+%5C+%5Cfrac%7Ba-b%7D%7B%5Csqrt%5B3%5D%7Ba%7D-%5Csqrt%5B3%5D%7Bb%7D%7D-%5Cfrac%7Ba%2Bb%7D%7B%5Csqrt%5B3%5D%7Ba%7D%2B%5Csqrt%5B3%5D%7Bb%7D%7D%3D%5C%5C%5C%5C%5C%5C%3D%5Cfrac%7B%28%5Csqrt%5B3%5D%7Ba%7D-%5Csqrt%5B3%5D%7Bb%7D%29%28%5Csqrt%5B3%5D%7Ba%5E2%7D%2B%5Csqrt%5B3%5D%7Bab%7D%2B%5Csqrt%5B3%5D%7Bb%5E2%7D%29%7D%7B%5Csqrt%5B3%5D%7Ba%7D-%5Csqrt%5B3%5D%7Bb%7D%7D-%5Cfrac%7B%28%5Csqrt%5B3%5D%7Ba%7D%2B%5Csqrt%5B3%5D%7Bb%7D%29%28%5Csqrt%5B3%5D%7Ba%5E2%7D-%5Csqrt%5B3%5D%7Bab%7D%2B%5Csqrt%5B3%5D%7Bb%5E2%7D%29%7D%7B%5Csqrt%5B3%5D%7Ba%7D%2B%5Csqrt%5B3%5D%7Bb%7D%7D%3D%5C%5C%5C%5C%5C%5C%3D%5Csqrt%5B3%5D%7Ba%5E2%7D%2B%5Csqrt%5B3%5D%7Bab%7D%2B%5Csqrt%5B3%5D%7Bb%5E2%7D-%28%5Csqrt%5B3%5D%7Ba%5E2%7D-%5Csqrt%5B3%5D%7Bab%7D%2B%5Csqrt%5B3%5D%7Bb%5E2%7D%29%3D%5C%5C%5C%5C%5C%5C%3D+%5Csqrt%5B3%5D%7Ba%5E2%7D%2B%5Csqrt%5B3%5D%7Bab%7D%2B%5Csqrt%5B3%5D%7Bb%5E2%7D-%5Csqrt%5B3%5D%7Ba%5E2%7D%2B%5Csqrt%5B3%5D%7Bab%7D-%5Csqrt%5B3%5D%7Bb%5E2%7D%3D2%5Csqrt%5B3%5D%7Bab%7D)
Если <span>угол между апофемой и основанием 45 градусов, то высота пирамиды равна половине стороны а основания (квадрата).
(1/2)а = 16 см.
а = 16*2 = 32 см.
So = a</span>² = 32² = <span>
1024 см</span>².
V = (1/3)So*H = (1/3)*1024*16 = <span>
16384/3 </span>≈ <span>
546</span><span>1,</span>333 см³.
[3,5]-[-0,5]=[3]
[ -3 9/5]*[ -0.75]=[6,5]
[-7,5]:[-4/3]=[10]
5 дм - 3 дм 2 см = 4 дм 10 см - 3 дм 2 см= 1 дм 8 см.