Writing Mathematical Formulas on the Forum

In order to help you with the questions you post more efficiently please use the following guide to write math formulas.

In most cases, you'll just need to do

2-3 simple steps:Simple Formulas

How to make 7x^2+5(x+3)>1 to look like

7x^2+5(x+3)>1Step 1: Highlight 7x^2+5(x+3)>1;

Step 2: Press

m button.

Fractions

How to make (x+3)/(x+5)>0 to look like

\frac{x+3}{x+5}>0:

Step 1: Highlight the fraction (x+3)/(x+5);

Step 2: Press

fraction button;

Step 3: Now, highlight the whole expression and press

m button.

Square roots

How to make (x+5)^(1/2)<17^(1/2) to look like

\sqrt{x+5}<\sqrt{17}:

Step 1: Highlight x+5 and press

square_root button, then highlight 17 and press

square_root button again;

Step 2: Now, highlight the whole expression and press

m button.

Other Useful Symbols

Another Way of Writing Fractions:How to make (a+b)/c to look like

\frac{a+b}{c}Step 1: Write \frac{a+b}{c}, (note that numerator and denominator must be enclosed in

{ } and you must write out

\frac to tell the system that it is a fraction);

Step 2. Highlight the whole expression and press

m button.

ExponentsHow to make x^12 to look like

x^{12}Step 1: Write

x^{12}, (note that multi-digit powers must be enclosed in

{ });

Step 2. Highlight the whole expression and press

m button.

RootsHow to make 3rd root of x^2 to look like

\sqrt[3]{x^2}Step 1: Write

\sqrt[3]{x^2}, (note that 3 must be enclosed in

[ ] and 2 must be enclosed in

{ });

Step 2. Highlight the whole expression and press

m button.

Inequalitiesx\approx{3}: write x\approx{3} and press

m button (note that 3 must be enclosed in

{ }).

x\leq5: write x\leq{5} and press

m button.

x\geq3: write x\geq{3} and press

m button.

x\neq0: write x\neq{0} and press

m button.

Subscriptx_1: write x_1 and press

m button. If a subscript is more than one-digit number, for example

x_{15} then write x_{15} and press

m button (note that such kind of subscripts must be enclosed in

{ }).

Geometry\pi: write \pi and press

m button;

\angle: write \angle and press

m button;

90^{\circ}: write 90^{\circ} and press

m button;

\alpha: write \alpha and press

m button;

\triangle: write \triangle and press

m button.

Full reference link for the extra curious: http://en.wikibooks.org/wiki/LaTeX/Mathematics#Math_operators
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