# Difference between revisions of "Comments:LaTeX-code for the most common formulas" If you have somewhere a very long formula, please share it with us. This will save time for everybody!

## Design-Tip

• A space before the formula leads to the box around the line.
• Don't hesitate it is not looking so good. That can be done by anybody else.
• An easy solution to get the same look is to copy the lines of an other formula for you formula.

## How to use the formulas

Just copy the text in the dotted box into you text-input-box. If the formula should be dynamic you need to insert the object at the place of the variable that is used here.

## Formulas

• Slope for a straight line:
m=\frac{y_2-y_1}{x_2-x_1}

m=\frac{y_2-y_1}{x_2-x_1}
a x^2\; +\; b x\; +\; c\; =\; 0

a x^2\; +\; b x\; +\; c\; =\; 0
• Vertex Form::
f(x)\; =\; a(x\; -\; h)^2\; +\; k

f(x)\; =\; a(x\; -\; h)^2\; +\; k
• Factored Form::
f(x)\; =\; (x\; +\; a)\;(x\; +\; b)

f(x)\; =\; (x\; +\; a)\;(x\; +\; b)
x\; =\; \frac {-b\; \pm\; \sqrt {b^2\; -\; 4ac}}{2a}

x\; =\; \frac {-b\; \pm\; \sqrt {b^2\; -\; 4ac}}{2a}
• Cubic Equation::
a x^3\; +\; b x^2\; +\; c x\; +\; d\; =\; 0

a x^3\; +\; b x^2\; +\; c x\; +\; d\; =\; 0
• Cubic Vertex Form::
f(x)\; =\; a(x\; -\; h)^3\; +\; k

f(x)\; =\; a(x\; -\; h)^3\; +\; k
• Basic Trigonometry::
sin A = \frac {opp}{hyp} = \frac {a}{c} = (a/c)

sin A = \frac {opp}{hyp} = \frac {a}{c} = (a/c)
f(x)\; =\; a\; sin\; b\;(x\; -\; h)\; +\; k

f(x)\; =\; a\; sin\; b\;(x\; -\; h)\; +\; k
f(x)\; =\; a\; sin\; (B x + C) + k

f(x)\; =\; a\; sin\; (B x + C) + k
b\;(x\; -\; h)\; = B\; \left( x\; -\; \frac {-C}{B} \right)

b\;(x\; -\; h)\; = B\; \left( x\; -\; \frac {-C}{B} \right)
h\; = \frac {-C}{B}

h\; = \frac {-C}{B}
• Limit forms::
\lim\limits_{\substack{x \to ? \\x > ?} }

\lim\limits_{\substack{x \to ? \\x > ?} }
\lim\limits_{\substack{x \to ? \\x < ?} }

\lim\limits_{\substack{x \to ? \\x < ?} }
\lim\limits_{x \to ?\infty}

\lim\limits_{x \to \infty}
• Compound Interest::
Interest = Principal * \left( 1 + \frac {rate}{periods}  \right)  ^ {time\; *\; periods}

Interest = Principal * \left( 1 + \frac {rate}{periods} \right) ^ {time\; *\; periods}
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