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 # Notes
 
 To convert an equation in the form of $(x^2-3x)$ into a square equivalent, you half the second value, then square that value (in this case 3) $(x-\frac{3}{2})^2$, resulting in an equation like this. 
+$$ y = -5x^2 -20x + 13 $$
+Given the above equation, you can factor out a -5, resulting in the equation $-5(x^2+4x) + 13)$. Half of 4 is 2, and because the inside is multiplied by -5, $-5 *4 = -20$, so you add -20 to the other side to equalize the equation, resulting in an equation in the form of $-20 + y = -5(x+2)^2+ 13$. This simplifies down to $y = -5(x+2)^2 + 33$. 
 # Forms
 **Standard form (vertex form)**
 $$ a(x - h)^2 + k $$