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 solve quadratic equations by completing the square in intermediate algebra.
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How To: Use ">" (greater than) and "<" (less than) symbols

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How To: Find the Percent Given Two Numbers

How To: Find a number given Its percent

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How To: Remember "greater than" & "less than" symbols

How To: Determine the age of a fossil using carbon14

How To: Convert Fahrenheit to Celsius with a formula

How To: Find the coordinate of a point

How To: Do long division without a calculator

How To: Find the slope of a line given 2 points with fractions

How To: Find a missing side of a triangle, similar to another

How To: Translate a shape

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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: Divide small numbers by big numbers

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How To: Find a missing coordinate given: coordinate & equation

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