ALGEBRA

If a and b are the roots of the equation x
2
- 9x + 20 = 0, find the value of a
2
+ b
2
+ ab?
A. -21
B. 1
C. 61
D. 21
ANS:C

Find the value of a/b + b/a, if a and b are the roots of the quadratic equation x
2
+ 8x + 4 = 0?
A. 15
B. 14
C. 24
D. 26
ANS:B