KaielH390345 KaielH390345
  • 25-10-2022
  • Mathematics
contestada

find all other zeros of P (x)= x^3-2x-4, given that -1-i is a zero. ( if there is more than one zero, separate them with commas.)

find all other zeros of P x x32x4 given that 1i is a zero if there is more than one zero separate them with commas class=

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AllisaT44791 AllisaT44791
  • 25-10-2022

Since this is a cubic equation, there are 3 possible zeroes

x= 2, x = -(1-i) and x = -(1+i)

We can solve the equation by factoring the P(x)

[tex](x-2)(x^2+2x+2)[/tex]

We can get the complex factor of the second term

[tex](x-2)(x+(1+i))(x+(1-i))_{}[/tex]

Given this factor, the function P(x) will be zero if

[tex]x\text{ = 2, -1-i, and -1+i}[/tex]

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