What real number that should be added to the polynomial f(x)=81x2-31, so that it is exactly divisible by 9x+1?
A. 40
B. 10
C. 30
D. 20
Answer:C
What real number that should be added to the polynomial f(x)=81x2-31, so that it is exactly divisible by 9x+1?
A. 40 B. 10 C. 30 D. 20