Answer:
30
Step-by-step explanation:
(2 + 1) (2 + 8)
Add the terms in the brackets first.
(3) (10)
Multiply both terms.
= 30
(3x²+6x-5)(-3x)
Apply distributive law.
-3x(3x²)-3x(6x)-3x(-5)
Simplify.
-9x³ - 18x² + 15x