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 a slope of a straight line with: Ax + By + C = 0

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

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How To: Find the Percent Given Two Numbers

How To: Calculate percent composition for chemistry

How To: Calculate the area of a parallelogram

How To: Convert Fahrenheit to Celsius with a formula

How To: Find the area of a circle when you know the diameter

How To: Find the opposite and absolute value of a number

How To: Solve percentages without a calculator

How To: Find Xbar with the Zscore formula

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

How To: Calculate Faster Than a Calculator

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

How To: Do long division without a calculator

How To: Find a number given Its percent

How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Convert between diameter and radius

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

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

How To: Find the standard deviation with the ZScore formula

How To: Calculate the height and volume of a pyramid

How To: Do long division with remainders

How To: Find the Percent Given Two Numbers

How To: Calculate percent composition for chemistry

How To: Calculate the area of a parallelogram

How To: Convert Fahrenheit to Celsius with a formula

How To: Find the area of a circle when you know the diameter

How To: Find the opposite and absolute value of a number

How To: Solve percentages without a calculator

How To: Find Xbar with the Zscore formula
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