Question

помогите пожалуйста!)​

Answer 1

D = b^2 - 4ac = 7^2 - 4(1 + 12) = 49 - 48 = 1

x1 = -D^(1/2) -b / 2a = -1 - 7/2 = -4

x2 = +D^(1/2) -b / 2a = 1 - 7/2 = -3