what is the sum of the polynomials?

$(-x^2 + 9) + (-3x^2 - 11x + 4)$

- $-4x^2 - 2x + 4$
- $-4x^2 - 11x + 13$
- $2x^2 + 20x + 4$
- $2x^2 + 11x + 5$

Question

what is the sum of the polynomials?

$(-x^2 + 9) + (-3x^2 - 11x + 4)$

- $-4x^2 - 2x + 4$
- $-4x^2 - 11x + 13$
- $2x^2 + 20x + 4$
- $2x^2 + 11x + 5$

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Polynomial Addition" ], "new_concepts": [], "current_concepts": [ "Polynomial Addition" ] } ## Group like terms $$ (-x^2 + 9) + (-3x^2 - 11x + 4) = (-x^2 - 3x^2) - 11x + (9 + 4) $$ ## Combine coefficients $$ -4x^2 - 11x + 13 $$

(A) $-4x^2 - 2x + 4$

(B) $-4x^2 - 11x + 13$

(C) $2x^2 + 20x + 4$

(D) $2x^2 + 11x + 5$

{ "subject": "Mathematics", "question_type": "Multiple Choice", "knowledge_point": [ "Mathematics", "Algebra", "Polynomial Addition" ] }

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Question

Explanation:

Group like terms

Combine coefficients

Answer: