Question

When completing the square of a parabola, if left side of the equation reads x^2+9x, then the constant that should be added to both sides is 81. True or False?

Answer 1

False! When completing the square:

1. Divide the "b" value by 2.

2. Square the quotient of b/2

3. Add product to both sides.

If done correctly, the constant added to both sides should be 81/4. Because I, personally, don't like decimals, I would leave the product in fraction form.

Answer 2

Thank you so much!

Answer 3

You got it! Have a nice day. :D