When x3 - 3x2 + 5x - 3 is divided by x2 - k , the remainder is 7x + a . Then the value of k is_____
2
1
3
6
On long division , we have
Remainder = ( 5 + k)x - 3k - 3 = 7x + a
Equating the coefficient of x , we get
5 + k = 7
=> k = 2
If x3 + 5x2 + 10 k leaves remainder –2x when divided by x2 + 2, then the value of k is