#1**+3 **

This is what I got--

(6x^3*4)+(4x^2*3x)+(-7x*3x^2)+(-5*6x^3)

24+12-21-30 = -15

Therefore, the coefficient would be -15.

Hope this helped!

CalTheGreat Mar 21, 2020

#5

#8**0 **

This is the correct answer:

Expand the following:

(24 x^4 + 6 x^3 + 4 x^2 - 7 x - 5) * (6 x^3 + 3 x^2 + 3 x + 4)

=144 x^7 + 108 x^6 + 114 x^5 + 84 x^4 - 15 x^3 - 20 x^2 **- 43 x** - 20

Guest Mar 21, 2020

#13

#15**+1 **

What is the coefficient of x^3 when 24x^4 + 6x^3 + 4x^2-7x - 5 is multiplied by 6x^3 + 3x^2 + 3x + 4 and the like terms are combined?

( 24x^4 + 6x^3 + 4x^2 - 7x - 5) * ( 6x^3 + 3x^2 + 3x + 4)

The coefficient on x^3 will be found as

6x^3 * 4 + 4x^2 * 3x - 7x* 3x^2 -5*6x^3 =

[ 6* 4 + 4*3 - 7*3 - 5*6 ] x^3 =

[24 + 12 - 21 - 30 ] x^3 =

-15 x^3

CPhill Mar 21, 2020