Question

Fill in the blank with a constant, so that the resulting quadratic expression is the square of a binomial.

Answer 1

121.

Check: x^2+22x+121=(x+11)^2

Answer 2

Answer: 121

Step-by-step explanation:

The formula for the square of sums is $(a+b)^2=a^2+2ab+b^2$.

Applying the formula, we see that the only option for b is 11 squared, or 121.