Respuesta :

Equanimity
The answer is 3ab2; since the sum of 2ab2 and (-5ab2) is -3ab2, we need to add a number to equal (-3ab2).
botellok

Answer:

3ab^2

Step-by-step explanation:

[tex]2ab^{2} + (-5ab^{2}) = 2ab^{2}-5ab^{2} = -3ab^{2}[/tex]

Now,

[tex]-6ab^{2}+x = -3ab^{2}[/tex]

[tex]x = -3ab^{2}+6ab^{2}[/tex]

[tex]x = 3ab^{2}[/tex]