7. Which of the following polynomial is prime?
A. x² + 3x
B. 4x + 20
C.xy
D. 5x - 11x
8. Which of the following is NOT a possible value of n to make 8x" - 100C a differer cubes?
A 2
B. 3
C.6
D. 15
9. Which of the following is a sum of two cubes?
A. m' + 9
B. m+ 27
C. m + 9
D. m' + 8
10. What is the greatest common factor of adbºc + acd??
A. a² b³ c⁴
B. a⁵ c⁶ d⁷
C. abc
D. a²c⁴
11. What should be the last term to make x2 + 10x a perfect square trinomial?
A 20
B. 25
C. 50
D. 100​