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taurus [48]
3 years ago
6

13. If x + y + z-0 then x+y+z'is equal to:(a) 3xyz(b) - 3xyz(c) xy(d)-2xy​

Mathematics
1 answer:
kolbaska11 [484]3 years ago
7 0

Answer:

a

Step-by-step explanation:

(x³ + y³ +z³) - 3xyz = (x + y + z )(x² +y² +z² - xy -yz - zx)

If x +y + z = 0, then

(x³ + y³ +z³) - 3xyz = 0 *(x² +y² +z² - xy -yz - zx)

(x³ + y³ +z³) - 3xyz = 0

(x³ + y³ +z³)  =  3xyz

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