Respuesta :

meredith48034

Answer:

x^2 14x + 49

Step-by-step explanation:

Use F.O.I.L method

FIRST: x * x = x^2

OUTSIDE: 7*x

INSIDE: 7*x

LAST: 7*7= 49

x^2 + 7x + 7x + 49

x^2 14x + 49

lizzybogita

Answer:

x^2 + 14x + 49

Step-by-step explanation:

(x + 7)^2

use the perfect trinomial formula: (a+b)^2 = a^2 -2ab +b^2

input variables

(x+7)^2 = x^2 -2(7)(x) +7^2

            = x^2 -14(x) + 49

            = x^2 -14x + 49