What value of x would prove the line segment tanget to the circle​

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.