12. One of the roots of x2 + 5x - 14 = 0 is 2. What is the other root?
A. -5
B. 5
C.-7
D. 7

13 The roots of the quadratic equation are -9 and 4. Which of the following quadratic equations has these roots? A..x2 - 5x + 36 = 0
B.x2 + 4x - 27 = 0
C.x2 + 5% - 36 = 0
D.x2 - 4x + 27 = 0
14. Find the value of the discriminant of the given quadratic equation 2x2 + 5x - 18 = 0.
A. 144
B. 169
C.473
D. 35 -​