Answer:
Step-by-step explanation:
(x-7)(x^2 - 8x - 19)
=(x+−7)(x^2+−8x+−19)
=(x)(x^2)+(x)(−8x)+(x)(−19)+(−7)(x^2)+(−7)(−8x)+(−7)(−19)
=x^3−8x^2−19x−7x^2+56x+133
=x^3−15x^2+37x+133
Answer:
x^3 -15x^2 +37x +133
Step-by-step explanation:
(x-7)(x^2 - 8x - 19)
Multiply x by all the terms in the second parenthesis
x * (x^2 - 8x - 19)
x^3 -8x^2 -19x
Multiply -7 by all the terms in the second parenthesis
-7 * (x^2 - 8x - 19)
-7x^2 +56x +133
Add the results together.
I like to line them up vertically
x^3 -8x^2 -19x
-7x^2 +56x +133
-----------------------------
x^3 -15x^2 +37x +133
