When x 2 + ax + b is divided by (x -1) , the remainder is 15 and when x 2 + bx + a is divided by (x + 1),the remainder is-1, then the value of a 2 + b 2 is:

When x 2 + ax + b is divided by (x -1) , the remainder is 15 and when x 2 + bx + a is divided by (x + 1),the remainder is-1, then the value of a 2 + b 2 is:
1). 10
2). 20
3). 8
4). 16

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