Divide (x3 + 3x2 + 16x + 48) by (x + 3)
( x³ + 3 x² + 16 x + 48 ) : ( x + 3 ) = x² + 16
- x³ - 3 x²
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16 x + 48
- 16 x - 48
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r = 0
Answer: x² + 16