What is the missing constant term and a perfect square starts with x^2+10x

The perfect square is a number that is the product of two identical numbers. So 9 is a perfect square because it's the product of 3 * 3. For variables, perfect squares can be expressed as or , where a is some number and x is the variable.
If we expand these terms, , and . Since the given term is , we can see that it's part of the perfect square . We just need to find .
So, . Notice that , so . So, the missing constant term is . The perfect square is .