Where does the quadratic formula come from?
85065
Why can ALL quadratic equations be solved by the quadratic formula?
71591
Formula for completing the square?
102279
Derivative of Quadratic Form
85351
Standard Deviation. Why do we take the square root of the entire equation?
103921
Why are quadratic equations called quadratics?
31027
Ahlfors "Prove the formula of Gauss"
54539
Quadratic substitution question: applying substitution $p=x+\frac1x$ to $2x^4+x^3-6x^2+x+2=0$
489
How to take the gradient of the quadratic form?
64448
Find a quadratic equation with root $x_1^2$ and $x_2^2$
153647
Elementary number theory and quadratic
87637
Does it make sense to add a quadratic term but not the linear term to a model?
101202
Infinite Geometric Series Formula Derivation
150446
Quadratic Modular Arithmetic
4828
Where did the Q come from, before the Q Continuum?
146956
In simple linear regression, where does the formula for the variance of the residuals come from?
11654
Where does $xe^x$ solution come from when the characteristic polynomial is square?
129646
Defining a function that completes the square given a quadratic polynomial expression