2010 · Q8
If the expression (px3 + x2-2x-q) is divisible by (x – 1) and (x + 1), what are the values of p and q respectively?
Elementary MathematicsAlgebra
- A2, -1
- B-2,1
- C-2,-1
- D2,1
Explanation
At x=1: p-q=1; at x=-1: p+q=3; solving gives p=2, q=1.
If the expression (px3 + x2-2x-q) is divisible by (x – 1) and (x + 1), what are the values of p and q respectively?
Explanation
At x=1: p-q=1; at x=-1: p+q=3; solving gives p=2, q=1.