LilyannP606781 LilyannP606781

30-10-2022
Mathematics

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Question 3 (4 points) Use FOIL to derive the identify for (a - b)2.

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RobertH436752 RobertH436752

30-10-2022

Foil is the math standard for the multiplication of polynomials. So

(a - b)² = (a - b)*(a - b) = a*a + a*(-b) - b*a - b*(-b) = a² -ab - ab + b² = a² - 2ab + b²

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