x^2 - 2 x + 1 = 0 a x^2 + b x + c = 0 | x | indeterminate variable a | quadratic coefficient b | linear coefficient c | constant coefficient (x = (-b ± sqrt(b^2 - 4 a c))/(2 a))

quadratic coefficient | 1 linear coefficient | -2 constant coefficient | 1

indeterminate variable | 1 (doubly degenerate)