+1382
(x3 + x2 + x + 1)(x4 - 8x3 + 17x2 - 23x + 14)
Every term in the first expression will be multiplied with every term in the second expression.
Which term(s) times which term(s) will result in x with no exponent....
(x3 + x2 + x + 1)(x4 - 8x3 + 17x2 - 23x + 14) gives us 14x
(x3 + x2 + x + 1)(x4 - 8x3 + 17x2 - 23x + 14) gives us 23x
Add them together 37x
So the coefficient the problem is asking for is 37.
.
+1382
Dang, I made a careless mistake. I wonder how many of you caught it.
I overlooked the minus in front of 23x. Too late to edit my mistake, grrr.
The lines should look like this:
(x3 + x2 + x + 1)(x4 – 8x3 + 17x2 – 23x + 14) gives us 14x
(x3 + x2 + x + 1)(x4 – 8x3 + 17x2 – 23x + 14) gives us –23x
Add them together –9x
So the coefficient the problem is asking for is –9.
.
