Question

Brian correctly used a method of completing the square to solve the equation x2+7x-11=0. Brian's first step was to rewrite the equation as x2+7x=11. He then added a number to both sides of the equation. Which number did he add?

Answer 1

11

Explanation:

Since Brian added 11 points to the left side of the equation, it cancels out the previous -11.

Since he added 11 on the right side of the equation, it is displayed there.

Answer 2

The answer is actually 49/4

Explanation: