4. Add the polynomials.
(a) 3x2 - 4x + 6x3 - 5 and 8x3 - 4x2 + 5x + 5
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3x² - 4x +6x³ + 8x³ - 4x² + 5x+5
{ take common terms one side}
=> 3x² - 4x² - 4x +5x +6x³ +8x³ +5
=> -x² +x +14x³ +5
hence your answer is =>
-x² +x +14x³ +5
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