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 multiply (or divide) and express as a simplified rational, stating the domain.
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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find extra points for a parabola (quadractic equation)

How To: Find the Slope Given 2 Ordered Pairs

How To: Calculate Faster Than a Calculator

How To: Divide small numbers by big numbers

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

How To: Factor a trinomial with negative leading coefficient

How To: Convert temperature using y = mx + b

How To: Convert between diameter and radius

How To: Find the 100th term in a sequence

How To: Find the x & y intercepts of rational functions

How To: Prove Rank(A) = Rank(transpose of A) in linear algebra

How To: Solve word problems containing radical equations

How To: Find the perimeter & area of a complex figure

How To: Know if matrices can be multiplied

How To: Find percent by mass & percent composition

How To: Graph a quadratic function in factored form

How To: Solve proportions

How To: Find the circumference of a circle quickly

How To: Do long division without a calculator
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