Question

1000а²×40²+(38,09а²×2а²)=
при а= -2

Answer 1

1000a^2*40^2+(38,09a^2*2a^2)
При a= -2 :
1000-2^2*40^2+(38,09-2^2*2-2^2)

1000-(2*40)^2+(38,09-2^3-4)

1000-80^2+(38,09-8-4)

1000-6400+26,09

-5373,91