Question

which expression is equivalent to (5x2 + 2x + 1) + (6x2 − 3x + 9) -A. -3x2 + 11x − 3 B. 11x2 − x + 10 C. 4x2 + 27x − 28 D. -3x2 + 11x + 31

Answer 1

Answer:

B. 11x^2 − x + 10

Step-by-step explanation:

(5x^2 + 2x + 1) + (6x^2 − 3x + 9)

I like to line them up vertically

  (5x^2 + 2x + 1)

+ (6x^2 − 3x + 9)

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11 x^2  -  x   + 10