What is the missing constant term in the perfect square that starts with x2 + 10x?

Okay so I am assuming you mean the third part?

Step-by-step explanation:

Pretty simple. So you see that the varible x^2 does not have a number in front of it, so there is no extra dividing.

A formula for a perfect square is (x^2) + 2xy+y^2

Take 10 and divide it by 2.

10/2=5

You have Y. Finding the third part is squaring Y.

5^2=25

Therefore, the third part of the perfect square is 25. If you want to find Y, look at the stuff above.