Answer:
the correct answer is
[tex] 4 {x}^{2} + 28x + 49[/tex]
Answer:4x^2+28x+49
Step-by-step explanation:
(2x+7)^2
(2x+7)(2x+7)
Open brackets
4x^2+14x+14x+49
4x^2+28x+49
