Respuesta :

wegnerkolmp2741o

Answer:

-2x^2 +18x+2

Step-by-step explanation:

-x^2 +9x+1 +-x^2 +9x+1

I like to line them up vertically

-x^2 +9x+1

-x^2 +9x+1

-------------------

-2x^2 +18x+2

Answer:

a

Step-by-step explanation:

To simplify remove parenthesis and collect like terms

(- x² + 9x + 1) + (-x² + 9x + 1)

= - x² + 9x + 1 - x² + 9x + 1 ← collect like terms

= (- x² - x² ) + (9x + 9x) + (1 + 1)

= - 2x² + 18x + 2 → a


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