Respuesta :

apologiabiology
we are only concerd with the x term

3x-(-6x)=
3x+6x=
9x
b=9

Answer:

B = 9

Step-by-step explanation:

(5x^2 + 3x + 4) - (2x^2 - 6x +3)

5x^2 +2x^2 + 3x - (-6x) + 4 + 3

3x^2 + 9x + 7

Therefore, B = 9

This is correct I took the test.

good job