Math Homework. Do It Faster, Learn It Better.
Cross Products
In an equation of the form
,
we can multiply both sides by to get the equation
.
This is known by many names: cross-multiplying, taking cross-products, the means-extremes property, or the reciprocal property.
Example:
Solve for .
Use the means-extremes property to get a simpler equation.
Now simplify and solve.