OpenStudy (anonymous):

Find the product of (3x − 7y)^2. 9x^2 − 42xy + 49y^2 9x^2 + 42xy + 49y^2 9x^2 − 49y^2 9x^2 + 49y^2

OpenStudy (anonymous):

\[(3x − 7y)^2\] \[(3x − 7y)(3x − 7y)\] FOIL

OpenStudy (anonymous):

I don't understand what foil is, I've never learned it before.

OpenStudy (anonymous):

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