saramurillo saramurillo
  • 25-02-2022
  • Mathematics
contestada

SOMEONE PLEASE HELP....

SOMEONE PLEASE HELP class=

Respuesta :

linandrew41
linandrew41 linandrew41
  • 25-02-2022

Answer:

Step-by-step explanation:

[tex](3x+4)(x^2+px+5) \\=3x^3+3px^2+15x+4x^2+4px+20\\=3x^3+(3p+4)x^2+(15+4p)x +20[/tex]

since we know that [tex]x^2[/tex]  in this expansion is [tex]-23x^{2}[/tex]

thus [tex]3p+4=-23\\3p=-27\\p=-9[/tex]

Hope that helps!

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