Factor polynomials of various degrees using factorization methods that are based on the special product forms "difference of squares" and "perfect squares." For example, factor 25x⁴-30x²+9 as (5x²-3)².
3338_Factoring_perfect_squares_4th_degree_polynomial.html
3340_Factoring_difference_of_squares_two_variables_example_2_.html
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