Respuesta :
(-2ab + 6a - 6 ) - (-4ab - 6)= ***at this step you have to distribute the negative sign
=-2ab + 6a - 6 +4ab + 6
= 2ab + 6a
hope this helps
=-2ab + 6a - 6 +4ab + 6
= 2ab + 6a
hope this helps