X (y+z) = 2, y (x+z) = - 28, z (x+y) = - 10. Найдите x, y, z.

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25 марта, 01:39

X (y+z) = 2, y (x+z) = - 28, z (x+y) = - 10. Найдите x, y, z.

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Нада · Answer 1

Xy+zx = 2

yx+yz = - 28

zx+yz = - 10

xy = 2-zx

2-xz + yz = - 28 - > xz = 30 + yz

30+yz + yz = - 10 - > yz = - 20 - > xz = 10 - > xy = - 8

yz/xz = - 2 и xy = - 8 - > y = - + 4, x = + - 2 - > z = + - 5