Factor Difference of Two Squares: 81x^2-49

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The problem to be factored is 81x^2-49. This expression contains 2 terms, there is a minus sign between them, and both terms are perfect squares. Therefore this expression is the difference of 2 squares and it is factored using a^2-b^2=(a-b)(a+b).
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Thank you, I have a quiz tomorrow and this video really helped 👍

Miguel-cidz