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 finish your homework or 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 simplify polynomials by combining like terms through addition and subtraction.
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How To: Remember "greater than" & "less than" symbols

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Calculate Faster Than a Calculator

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

How To: Find the Percent Given Two Numbers

How To: Calculate percent composition for chemistry

How To: Find the Slope Given 2 Ordered Pairs

How To: Convert Fahrenheit to Celsius with a formula

How To: Derive the equation of a straight line

How To: Graph x & y intercepts on a TI84 Plus calculator

How To: Solve inequalities with fractions in algebra

How To: Do long division without a calculator

How To: Divide small numbers by big numbers

How To: Convert between diameter and radius

How To: Find the area of a parallelogram using geometry

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

How To: Solve an equation with fractional powers

How To: Solve for the missing ratios or proportions

How To: Solve an equation with a radical under a radical

How To: Calculate probability in "at least one" problems
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