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		brookst on Dec 16, 2024 \| parent \| context \| favorite \| on: A visual proof that a^2 – b^2 = (a + b)(a – b) I like this teacher.

saghm on Dec 16, 2024 [–]

He was pretty great! He was super smart, super passionate, and had a great sense of humor; everything I could have asked for in a teacher.

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