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Example Questions
Example Question #87 : Algebra
If , , and , then
Possible Answers:
Correct answer:
Explanation:
To find what equals, you must know how to multiply times , or, you must know how to multiply binomials. The best way to multiply monomials is the FOIL (first, outside, inside, last) method, as shown below:
Multiply the First terms
Multiply the Outside terms:
Multiply the Inside terms:
Note: this step yields a negative number because the product of the two terms is negative.
Multiply the Last terms:
Note: this step yields a negative number too!
Putting the results together, you get:
Finally, combine like terms, and you get:
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