а) (3a+4)^2 = 9a^2 + 24a + 16б) (2b-3/2a)^2 = 4b^2 - 6b/2a + 9/4a^2 = 4b^2 - 6b/a + 9/4a^2в) (2a+b) (2a-b) = 4a^2 - b^2г) (1/3b^2-2x)(1/3b^2+2x) = 1/9b^4 - 4x^2
а) (3a+4)^2 = 9a^2 + 24a + 16
б) (2b-3/2a)^2 = 4b^2 - 6b/2a + 9/4a^2 = 4b^2 - 6b/a + 9/4a^2
в) (2a+b) (2a-b) = 4a^2 - b^2
г) (1/3b^2-2x)(1/3b^2+2x) = 1/9b^4 - 4x^2