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 applying the quadratic formula.
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How To: Evaluate fractions containing variables

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How To: Calculate Faster Than a Calculator

How To: Do long division without a calculator

How To: Find a number given Its percent

How To: Convert Fahrenheit to Celsius with a formula

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

How To: Find the area of a triangle when given 2 sides & angle

How To: Find the standard deviation with the ZScore formula

How To: Evaluate combinations of functions from graphs

How To: Use the distance formula for two points

How To: Divide decimals

How To: Solve circlebased problems in basic geometry

How To: Multiply fractions, polynomials, signed numbers, exponents, and square roots

How To: Understand arithmetic basics to do long division

How To: Divide small numbers by big numbers

How To: Calculate percent composition for chemistry

How To: Solve problems involving functions in algebra

How To: Evaluate fractions containing variables

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

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

How To: Subtract a mixed number from a proper fraction in basic math

How To: Calculate Faster Than a Calculator

How To: Do long division without a calculator

How To: Find a number given Its percent

How To: Convert Fahrenheit to Celsius with a formula

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

How To: Find the area of a triangle when given 2 sides & angle

How To: Find the standard deviation with the ZScore formula

How To: Evaluate combinations of functions from graphs

How To: Use the distance formula for two points

How To: Divide decimals

How To: Multiply fractions, polynomials, signed numbers, exponents, and square roots

How To: Solve circlebased problems in basic geometry

How To: Understand arithmetic basics to do long division

How To: Divide small numbers by big numbers

How To: Calculate percent composition for chemistry

How To: Solve problems involving functions in algebra
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