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If x^2 + ax + b when divided by x + 3 le...

If `x^2 + ax + b` when divided by x + 3 leaves a remainder of 22 and `x^2 + bx+ a` when divided by x - 3, leaves a remainder of 24, then a + b=?

A

7

B

23

C

`-7`

D

`-3.4`

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