а) (6x-1)(1-6x) = -36*x^2+12*x-1
б) (5а^2+1)(5а^2+2) = 25*a^4+15*a^2+2
в) (4x^2-3)(4x^2+3) = 16*x^4-9
а) (6x-1)(1-6x) = -36*x^2+12*x-1
б) (5а^2+1)(5а^2+2) = 25*a^4+15*a^2+2
в) (4x^2-3)(4x^2+3) = 16*x^4-9