а) а^2 + 6а + 9 = a^2 + 2*a*3 + 3^2 = (a+3)^2
б) 9 - 6b + b^2 = 3^2 - 2*3*b + b^2 = (3-b)^2
в) х^2 - 12х +36 = x^2 - 2*x*6 + 6^2 = (x-6)^2
г)16b^2 - 8b + 1 = (4b)^2 - 2*4b*1 + 1^2 = (4b-1)^2
д) 4у^2 + 4у + 1 = (2y)^2 + 2*2y*1 + 1^2 = (2y+1)^2
а) а^2 + 6а + 9 = a^2 + 2*a*3 + 3^2 = (a+3)^2
б) 9 - 6b + b^2 = 3^2 - 2*3*b + b^2 = (3-b)^2
в) х^2 - 12х +36 = x^2 - 2*x*6 + 6^2 = (x-6)^2
г)16b^2 - 8b + 1 = (4b)^2 - 2*4b*1 + 1^2 = (4b-1)^2
д) 4у^2 + 4у + 1 = (2y)^2 + 2*2y*1 + 1^2 = (2y+1)^2