Respuesta :
The X just represents what the value will be in the equation, in this case 3, and when you have the letter besides a number, you just multiply them together:
x2+x = (2*3)+3 = 9
The answer is 9,
Hope this helps! :)
x2+x = (2*3)+3 = 9
The answer is 9,
Hope this helps! :)