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 simplify polynomials by combining like terms through addition and subtraction.
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How To: Remember "greater than" & "less than" symbols

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

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

How To: Calculate Faster Than a Calculator

How To: Convert between diameter and radius

How To: Prove the log a + log b = log ab logarithm property

How To: Find the Percent Given Two Numbers

How To: Do long division without a calculator

How To: Calculate percent composition for chemistry

How To: Find a number given Its percent

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

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

How To: Find the equation of a line given 1 point

How To: Solve word problems involving domain and range

How To: Use derivatives to find slope in calculus

How To: Convert temperature using y = mx + b

How To: Use the upsidedown birthday cake method to find a GCF

How To: Graph an inequality on a number line in Algebra

How To: Find a percent of a number

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