What must be subtracted from (x4+2x3-2x2+4x+6)so that the result is exactly divisible by (x2+2x-3)

What must be subtracted from (x4+2x3-2x2+4x+6)so that the result is ex

1.	What must be subtracted from (x4+2x3-2x2+4x+6)so that the result is exactly divisible by (x2+2x-3)
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