Question

Can anyone help with this?

Answer 1

420 420 420 420 420 420 420 420 420

Answer 2

Answer:

46

Step-by-step explanation:

The complete square starting with $x^2+14x$ would be $x^2+14x+49$, since the square would be $(x+7)^2$. To make this square perfect, then, you would need to add 46 to make 49 with the 3. Hope this helps!