What must be added to 5x3 minus- 2x2 - 6x - 7 to make the sum x3 - 3x2 minus- x - 1-a- 4x3 minus- 5x2 - 7x - 6-b- minus-4x3 - 5x2 minus- 7x minus- 6-c- 4x3 - 5x2 minus- 7x - 6-d- none of these

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Addition and Subtraction Patterns

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What must be added to 5x³ − 2x² + 6x + 7 to make the sum x³ + 3x² − x + 1?
(a) 4x³ − 5x² + 7x + 6
(b) −4x³ + 5x² − 7x − 6
(c) 4x³ + 5x² − 7x + 6
(d) none of these

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