Question

What constant do you need to add to each quadratic to complete the square?
1. x^2 - 4x = 0
2. x^2 - 8x = 6
3. 3x^2 + 18x = 24

Answer 1

the standard formula is
\[(x+\frac{ b }{ 2 })^{2} - (\frac{ b }{ 2 })^{2}\]

the standard form of a quadratic is

\[ax^{2}+bx+c\]

Answer 2

for x^2 - 4x = 0
b=-4

Answer 3

2) x^2 -8x -6 +22 =0
x^2-8x+16=0
(x-4)(x-4) =0