Respuesta :

Answer: x=2

Step-by-step explanation:

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Answer:

(f+g)(x) = f(x) +g(x)

= (7x^3 −2x−12) +(−3x^3 -8x^2 +10x)

= x^3(7 -3) +x^2(-8) +x(-2+10) +(-12)

= 4x^3 -8x^2 +8x -12

Corresponds to selection C.

Step-by-step explanation: