(x+7)^2
Expanding the expression (x+7)^2 using the formula (a+b)^2 = a^2 + 2ab + b^2:
(x+7)^2 = x^2 + 2(7)(x) + 7^2
(x+7)^2 = x^2 + 14x + 49
Therefore, (x+7)^2 = x^2 + 14x + 49
(x+7)^2 = x^2 + 2(7)(x) + 7^2
(x+7)^2 = x^2 + 14x + 49
Therefore, (x+7)^2 = x^2 + 14x + 49