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a^2 - b^2 = (a+b)(a-b), Algebraic Formula by lgbu
by Thingiverse
Last crawled date: 3 years, 1 month ago
(a+b)(a-b)=a^2-b^2
Models play an important role in algebraic thinking. Here is a geometric model for (a+b)(a-b), requiring almost no word. Yes, (a+b)(a-b)=a^2+ab-ab-b^2. But a picture is appealing, too. You can use all the three pieces or just the board. I do think on needs to talk about it, though.
Models play an important role in algebraic thinking. Here is a geometric model for (a+b)(a-b), requiring almost no word. Yes, (a+b)(a-b)=a^2+ab-ab-b^2. But a picture is appealing, too. You can use all the three pieces or just the board. I do think on needs to talk about it, though.
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