https://www.khanacademy.org/math/algebra-home/alg-polynomials/alg-factoring-quadratics-perfect-squares/v/identifying-perfect-square-trinomials
https://www.khanacademy.org/math/algebra-home/alg-polynomials/alg-factoring-quadratics-perfect-squares/v/factoring-perfect-square-trinomials
https://www.khanacademy.org/math/algebra-home/alg-polynomials/alg-factoring-quadratics-perfect-squares/v/factoring-perfect-square-polynomial
https://www.khanacademy.org/math/algebra-home/alg-polynomials/alg-factoring-quadratics-diff-of-squares/v/factoring-to-produce-difference-of-squares
Homework: Exercise 3.3 (page 82) # 1 – 3 (a – e)
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