ahusseinah75
ahusseinah75 ahusseinah75
  • 17-07-2020
  • Mathematics
contestada

find the value of k if x minus 2 is a factor of P of X that is X square + X + k​

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Alfpfeu
Alfpfeu Alfpfeu
  • 17-07-2020

Answer:

k = -6

Step-by-step explanation:

hello

saying that (x-2) is a factor of [tex]x^2+x+k[/tex]

means that 2 is a zero of

[tex]x^2+x+k=0 \ so\\2^2+2+k=0\\<=> 4+2+k=0\\<=> 6+k =0\\<=> k = -6[/tex]

and we can verify as

[tex](x^2+x-6)=(x-2)(x+3)[/tex]

so it is all good

hope this helps

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