а) (3n-4)² = (3n-4)(3n-4) = 9n² - 12n - 12n + 16 = 9n² - 24n + 16б) (2x+y)² = (2x+y)(2x+y) = 4x² + 2xy + 2xy + y² = 4x² + 4xy + y²в) ((m+3/4n)x(m-3/4n)) / = (m² - (9/16)n²)x
а) (3n-4)² = (3n-4)(3n-4) = 9n² - 12n - 12n + 16 = 9n² - 24n + 16
б) (2x+y)² = (2x+y)(2x+y) = 4x² + 2xy + 2xy + y² = 4x² + 4xy + y²
в) ((m+3/4n)x(m-3/4n)) / = (m² - (9/16)n²)x