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SOMEONE PLEASE HELP....
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SOMEONE PLEASE HELP....

SOMEONE PLEASE HELP....-example-1
User Pauldendulk
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1 Answer

8 votes

Answer:

Explanation:


(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

since we know that
x^2 in this expansion is
-23x^(2)

thus
3p+4=-23\\3p=-27\\p=-9

Hope that helps!

User Djoby
by
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