Completing the Square for Positive Constant Term

Rarely Tested

Completing the Square for Positive Constant Term

If:

$$4ac-b^2>0$$

then:

$$ax^2+bx+c=a\left[\left(x+\frac{b}{2a}\right)^2+\frac{4ac-b^2}{4a^2}\right]$$

Usage

- Used to identify the inverse-tangent form of a quadratic integral.

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