All radii of a circle are congruent true or false

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Find the equation of a line that is perpendicular to line g that contains (p, q). coordinate plane with line g that passes through the points negative 3 comma 6 and 0 comma 5 3x − y = 3p − q 3x + y = q − 3p x − y = p − q x + y = q − p