Respuesta :
after distributing the numbers, your equation looks like this:
x^2+6x+3x+18= x^2+6x+3x+18
the equations are equal, so you know that the answer is ALL REAL NUMBERS
x^2+6x+3x+18= x^2+6x+3x+18
the equations are equal, so you know that the answer is ALL REAL NUMBERS