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 unpack and solve word problems that require you to apply quadratic functions in algebra.
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How To: Calculate Faster Than a Calculator

Find the discriminant (DELTA): quadratic equation

How To: Calculate the sampling distribution of difference between means

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

How To: Do long division without a calculator

How To: Find the percentage of a number easily

How To: Calculate the area of complex shapes

How To: Compute a square root using the geometric method

How To: Isolate a variable

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

How To: Find the area of a parallelogram using geometry

How To: Calculate the area of a parallelogram

How To: Calculate percent composition for chemistry

How To: Identify characteristics of a sample during a survey

How To: Determine math proportions with the SquareCube Law

How To: Find a number given Its percent

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

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

How To: Write a slopeintercept equation given an XY table

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

How To: Calculate Faster Than a Calculator

Find the discriminant (DELTA): quadratic equation

How To: Calculate the sampling distribution of difference between means

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

How To: Do long division without a calculator

How To: Find the percentage of a number easily

How To: Calculate the area of complex shapes

How To: Compute a square root using the geometric method

How To: Isolate a variable

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

How To: Find the area of a parallelogram using geometry

How To: Calculate the area of a parallelogram

How To: Calculate percent composition for chemistry

How To: Identify characteristics of a sample during a survey

How To: Determine math proportions with the SquareCube Law

How To: Find a number given Its percent

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

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

How To: Write a slopeintercept equation given an XY table

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