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Polynomial equation: x3 + 6x2 - 40x = 192

Solutions: x = -8, x = -4, and x = 6

In the context of this problem, which solutions to the polynomial equation can you eliminate because they do not make sense?

x = –8

x = –4

x = 6

Respuesta :

If we substitute the correct value of x into the right side of the given expression, it should yield 192.

Test x = -8
(-8)^3 + 6(-8)^2 - 40(-8) = 192         Correct
Test x = -4
(-4)^3 + 6(-4)^2 - 40(-4) = 192         Correct
Test x = 6
6^3 + 6(6^2) - 40(6) = 192              Correct

All solutions make sense, so none of them should be eliminated.

Answer:

x= -4

x= -8

Step-by-step explanation:

Hope this helps