а) (х+4)2 = x^2 + 8x + 16
б) (3b-c)2 = 9b^2 - 6bc + c^2
в) (2y+5)(2y-5) = 4y^2 - 25
г) (y^2 - x)(y^2 + x) = y^4 - x^2
а) (х+4)2 = x^2 + 8x + 16
б) (3b-c)2 = 9b^2 - 6bc + c^2
в) (2y+5)(2y-5) = 4y^2 - 25
г) (y^2 - x)(y^2 + x) = y^4 - x^2