Consider the trinomial 
1. Find the discriminant:
2. Find the roots of given trinomial:
3. Conclusion: given trinomial has two different real roots.
Answer:
Angle OAB = 90°
Reason: tangent theorem of a circle
Step-by-step explanation:
The diagram given shows a tangent line of the given circle with center O. The tangent touches the circle at point A.
The diagram also shows the radius of the circle, OA, drawn from the center to the circle to meet at the point of tangency.
Thus, according to the Tangent Theorem of a circle, the point at which the radius drawn from the center meets the point of tangency = 90°. The tangent is perdendicular to the radius drawn to meet at the point of tangency.
Therefore, angle OAB = 90°
Answer:
The answer should be 25.
Step-by-step explanation:
Since we can rule out 25.4 for being too high, and 22 for being too low, the answer must be 25
