Question

What is the value of this expression when m =-3 given `2m^5-3m^3 + 12`?

Answer 1

`-393`

Explanation:

`"substitute "m=-3" into the expression"`

`=2xx(color(red)(-3))^5-3xx(color(red)(-3))^3+12`

`=(2xx-243)-(3xx-27)+12`

`=-486-(-81)+12`

`=-486+81+12=-393`