From 37d8feb5693765d6396de584887203acbde4174f Mon Sep 17 00:00:00 2001 From: Andrew Lorimer Date: Thu, 3 Jan 2019 13:55:32 +1100 Subject: [PATCH] finish polynomials for methods --- methods/polynomials.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/methods/polynomials.md b/methods/polynomials.md index 6fadf11..0542afc 100644 --- a/methods/polynomials.md +++ b/methods/polynomials.md @@ -4,7 +4,7 @@ #### Quadratics **Quadratics:** $x^2 + bx + c = (x+m)(x+n)$ where $mn=c$, $m+n=b$ -**Difference of squares:** $a^2 - b=^2 = (a - b)(a + b)$ +**Difference of squares:** $a^2 - b^2 = (a - b)(a + b)$ **Perfect squares:** $a^2 \pm 2ab + b^2 = (a \pm b^2)$ **Completing the square (monic):** $x^2+bx+c=(x+{b\over2})^2+c-{b^2\over4}$ **Completing the square (non-monic):** $ax^2+bx+c=a(x-{b\over2a})^2+c-{b^2\over4a}$ -- 2.47.1