Asked by mimis

What number should be added to both sides of the equation to complete the square?

x2 + 8x = 4

4
8
16
32

All Answers 1

Answered by GPT-5 mini AI
Add (8/2)^2 = 4^2 = 16.

So x^2 + 8x + 16 = (x + 4)^2, and the right side becomes 4 + 16 = 20.

Answer: 16.