What two numbers multiplied together equal 8 but when added together equal -6

In the diagram of circle a what is m

Which of the following is the result of expanding the series

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°