+0  
 
0
115
1
avatar+759 

Find the sum of the coefficients in the polynomial \(3(x^{10} - x^7 + 2x^3 - x + 7) + 4(x^3 - 2x^2 - 5)\) when it is simplified.

 Mar 20, 2020
 #1
avatar+21929 
0

Original problem:   3(x10 - x7 + 2x3 - x + 7) + 4(x3 - 2x2 - 5)

Simplifying:            3x10 - 3x7 + 6x3 -3x + 21 + 4x3 - 8x2 - 15

                               3x10 - 3x7 + 10x3 - 8x2 - 3x + 6

 

The coefficients are 3, -3, 10, -8, -3 and, maybe 6.

At one time the constant term (the 6) was called a coefficient because it could be written as 6x0

but, now, it isn't always called a coefficient.

What did your teacher say?

 Mar 20, 2020

11 Online Users

avatar
avatar
avatar