Answer:
x^2 + 10x + 25.
Step-by-step explanation:
When you have questions like these, where there is an (x + something)^2,
you just need to put it into this form:
x^2 + ____x + ____.
For the first blank, add 5 + 5 in this case.
For the second blank, multiply 5 * 5.
5 + 5 = 10.
5 * 5 = 25.
So the final answer is:
x^2 + 10x + 25.
