John D.

asked • 11/11/16

2x2 + 17x + 21 how to factor this with the box method

I want to know how to factor the equation using the box method/unfoil method thank you

Kenneth S.

THIS IS AN EXPRESSION, NOT AN EQUATION.
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11/11/16

Sherry S.

tutor
I understood the intent of his question, but yes it is an expression.
 
FYI, John - an expression does not have an equal sign; an equation does. It's kind of like in English class when you say "that rude man" instead of "that man is rude". I knew you wanted it factored ;) and that you didn't want me to correct your math-grammar in the process.
 
Sherry - making math as friendly as it can be
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11/11/16

1 Expert Answer

By:

Elizabeth H.

This is excellent!
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11/11/16

Sherry S.

tutor
Thanks, Elizabeth! 
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11/11/16

Mark M.

And why, mathematically, does this "work?"
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11/11/16

Sherry S.

tutor
It won't let me answer - third try! I googled it. But I love this method more than I hated it in the beginning.
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11/11/16

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