а) 25a^2-9b^2 = (5a+3b)(5a-3b)
б) 27х^6+1 = (3x^2+1)(9x^4-3x^2+1)
в) 0,36b^2-1,2bc+c^2 = (0,6b-c)^2
г) (х+6)^2-(х-3)^2 = (x+6+x-3)(x+6-x+3) = (2x+3)(9)
а) 25a^2-9b^2 = (5a+3b)(5a-3b)
б) 27х^6+1 = (3x^2+1)(9x^4-3x^2+1)
в) 0,36b^2-1,2bc+c^2 = (0,6b-c)^2
г) (х+6)^2-(х-3)^2 = (x+6+x-3)(x+6-x+3) = (2x+3)(9)