If using the method of completing the square to solve the quadratic equation x2 + 11x + 30 = 0, which number would have to be added to "complete the
square"?

The number to add is (11/2)^2 = 121/4

Step-by-step explanation:

Here, we want to know the number that will complete the square

We rewrite the equation as follows;

x^2 + 11x = -30

x^2 + 11x + (11/2)^2 = -30 + (11/2)^2

x^2 + 11x + 121/4 = -30 + 121/4

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values

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