Question

Multiply vertically:
(x-5)(6x^2-8x-6)

Answer 1

same concept as multiply numbers vertically :)

line them up and go at it ...

Answer 2

6x^2-8x-6
x - 5
----------
-30x^2 + 40x + 30
6x^2 - 8x^2 - 6x
-----------------------
6x^2 - 38x^2 +34x + 30

Answer 3

u follow that ok?

Answer 4

almost formated right :)

Answer 5

6x^3 but ill assume its a typo

Answer 6

yes should be 6x^3

Answer 7

with polys it might be easier to stager them to the left instead:

6x^2 -8x -6
x - 5
-----------
6x^3 -8x^2 - 6x
-30x^2 +40x +30
--------------------
6x^3 -38x^2 +34x + 30

whatever is easiest for you

Answer 8

correct answer is 6x^3 - 38x^2 +34x + 30