Respuesta :

rpband00
Hello there,

Simply plug in -2 for every b you see.
(-2)²+9(-2)+3
4-18+3
-14+3
-11

Hope this helps!
liz33312
Simply substitute b = -2 into the expression of b^2 + 9b + 3:

All the b in the expression will become -2.

(-2)^2 + 9(-2) + 3
{The power of 2 means the number is multiplied twice}
= (-2)(-2) + (-18) + 3
{Negative number times negative number will give you positive number}
= (4) - 18 + 3
= 4 - 18 + 3
= 4 + 3 - 18
= 7 - 18
= -11

Hope this helps! :)