SOLUTION: Multiply.(3 + square root 7)(3-Square root 7) I am trying to solve this but am unsure how to start?

Question 476669: Multiply.(3 + square root 7)(3-Square root 7)
I am trying to solve this but am unsure how to start?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Two ways to go about this.

1. Just use FOIL like you would on any pair of binomials.

2. Recognize that you are multiplying a pair of conjugate binomials so the result is the difference of two squares.

John

My calculator said it, I believe it, that settles it

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