From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve an equation in which to rational expressions are said to equal each other.
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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find the area of irregular shapes

How To: Draw a parallelogram given base, angle & altitude

How To: Divide small numbers by big numbers

How To: Calculate the area of a parallelogram

How To: Solve temperature subtraction problems (integers)

How To: Do synthetic division in intermediate algebra

How To: Convert between diameter and radius

How To: Use a TI89 to calculate nCr

How To: Write a logarithm as a sum or difference of logarithms

How To: Find the formula of a piecewise function given a graph

How To: Do normal probability calculations on a calculator

How To: Calculate the height and volume of a pyramid

How To: Find Leg Lengths and Hypotenuse of a 45 45 90 Triangle

How To: Find outliers using the Zscore method

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How To: Complete a proof involving angles

How To: Solve circlebased problems in basic geometry

How To: Calculate Faster Than a Calculator
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