the sum of the coefficients of x^2 and x in the product of (x+3) ( x-5) (x+7) is
a)24
b)-24
c)34
d)-34
Answers
Answered by
3
Given That
(x+3)(x-5) (x+7)=(x^2-5x+3x-15)(x+7)
=x^3+7x^2-2x^2-14x-15x-105
=x^3+5x^2-29x-105
From Above The Coefficient Of x^2 And X are 5,-29
The Required Sum Is -24
The Option b Is Correct
(x+3)(x-5) (x+7)=(x^2-5x+3x-15)(x+7)
=x^3+7x^2-2x^2-14x-15x-105
=x^3+5x^2-29x-105
From Above The Coefficient Of x^2 And X are 5,-29
The Required Sum Is -24
The Option b Is Correct
arshizeb96:
Thank you
Answered by
3
given that
(x+3) (x-5) (x+7)=( x^2-5x+3x-15) (x+7)
(x^2-2x-15) (x+7)
x^3-2x^2-15x +7x^2-14x-105
x^3+5x^2-29x-105
now ...sum of coefficients of x^2 ND x is given by 5 -29
= -24
so ur answer will be option b ...
I hope it helps !!!
(x+3) (x-5) (x+7)=( x^2-5x+3x-15) (x+7)
(x^2-2x-15) (x+7)
x^3-2x^2-15x +7x^2-14x-105
x^3+5x^2-29x-105
now ...sum of coefficients of x^2 ND x is given by 5 -29
= -24
so ur answer will be option b ...
I hope it helps !!!
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