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: Find standard deviation

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How To: Find the area & perimeter of triangles & squares

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How To: Do long division without a calculator

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

How To: Divide small numbers by big numbers

How To: Find a number given Its percent

How To: Figure out the domain of a vector function

How To: Find the slope from a set of points

How To: Find standard deviation

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

How To: Calculate percent composition for chemistry

How To: Figure out the domain & range of a piecewise function

How To: Find the standard deviation with the ZScore formula

How To: Convert Fahrenheit to Celsius with a formula

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

How To: Find the 100th term in a sequence

How To: Find and sketch the domain of a multivariable function

How To: Convert between diameter and radius

How To: Find the area & perimeter of triangles & squares

How To: Complete a proof involving segments

How To: Evaluate combinations of functions from graphs

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

How To: Do long division without a calculator

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

How To: Divide small numbers by big numbers

How To: Find a number given Its percent

How To: Figure out the domain of a vector function

How To: Find the slope from a set of points
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