Respuesta :
I think it’s (x+4)*(5x+1)
Write 21x as a sum ~ 20x + x
5x^2+20x+x+4
Then you factor out the 5x from the expression
5x * (x+4) + x+4
Then you factor out x+4 from the expression
(X+4) * (5x+1)
Then that’s your answer :) have a great day
Write 21x as a sum ~ 20x + x
5x^2+20x+x+4
Then you factor out the 5x from the expression
5x * (x+4) + x+4
Then you factor out x+4 from the expression
(X+4) * (5x+1)
Then that’s your answer :) have a great day