а) 3n−43n-43n−4² = 3n−43n-43n−43n−43n-43n−4 = 9n² - 12n - 12n + 16 = 9n² - 24n + 16б) 2x+y2x+y2x+y² = 2x+y2x+y2x+y2x+y2x+y2x+y = 4x² + 2xy + 2xy + y² = 4x² + 4xy + y²в) (m+3/4n)x(m−3/4n)(m+3/4n)x(m-3/4n)(m+3/4n)x(m−3/4n) / = m2−(9/16)n2m² - (9/16)n²m2−(9/16)n2x
а) 3n−43n-43n−4² = 3n−43n-43n−43n−43n-43n−4 = 9n² - 12n - 12n + 16 = 9n² - 24n + 16
б) 2x+y2x+y2x+y² = 2x+y2x+y2x+y2x+y2x+y2x+y = 4x² + 2xy + 2xy + y² = 4x² + 4xy + y²
в) (m+3/4n)x(m−3/4n)(m+3/4n)x(m-3/4n)(m+3/4n)x(m−3/4n) / = m2−(9/16)n2m² - (9/16)n²m2−(9/16)n2x